TUMOR-INFILTRATING CD4+ T LYMPHOCYTES IN EARLY BREAST CANCER REFLECT LYMPH NODE INVOLVEMENT

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"etiqueta" => "a" "identificador" => "aff1" ] 1 => array:3 [ "entidad" => "Department of Immunology and Biochemistry, Ribeirão Preto Medical School, University of São Paulo - São Paulo/SP, Brazil." "etiqueta" => "b" "identificador" => "aff2" ] 2 => array:3 [ "entidad" => "Department of Pathology, Ribeirão Preto Medical School, University of São Paulo - São Paulo/SP, Brazil." "etiqueta" => "c" "identificador" => "aff3" ] ] ] ] "textoCompleto" => "INTRODUCTIONBreast cancer is the most common neoplasm in women, and several studies have documented that these tumors are infiltrated by a heterogeneous population of immune cells, consisting of different proportions of T cells, B cells, natural killer (NK) cells, and macrophages.<a class="elsevierStyleCrossRefs" href="#bib1">1–4</a> Despite the presence of the immune response, many breast tumors progressively grow and spread, calling into question the role of tumor-infiltrating leukocytes in the tumor microenvironment.<a class="elsevierStyleCrossRef" href="#bib5">5</a>There is no definitive conclusion regarding the efficacy of T cell-dependent immune mechanisms or regarding the correlation between the extent and type of lymphocyte infiltration and the tumor progression in most subtypes of carcinoma of the breast.<a class="elsevierStyleCrossRefs" href="#bib4">4,5</a> These interrelationships could be considered to be important in view of the role played by the immune system in the pathogenesis and progression of the breast cancer.<a class="elsevierStyleCrossRef" href="#bib4">4</a>Previous studies have shown that the function of tumor-infiltrating lymphocytes is impaired by inhibitory cytokines,<a class="elsevierStyleCrossRef" href="#bib6">6</a> increased regulatory T lymphocyte activity,<a class="elsevierStyleCrossRef" href="#bib7">7</a> tumor cell MHC molecule alterations,<a class="elsevierStyleCrossRef" href="#bib8">8</a> and aberrant Fas lig- and expression,<a class="elsevierStyleCrossRef" href="#bib9">9</a> among others.Nodal status as determined by pathologic examination of lymph nodes has repeatedly been shown to be the single most important predictor of survival in breast cancer. Even patients with very small tumors and minimal involvement of a single axillary node have a significantly worse prognosis compared with patients with no axillary node involvement; there is a direct relationship between the number of involved axillary nodes and the risk for distant recurrence.<a class="elsevierStyleCrossRefs" href="#bib10">10,11</a>Collectively, these findings have led to increased interest in the role of tumor-infiltrating leukocytes in the regulation of tumor development. In our study, we analyzed by flow cytometry the tumor-infiltrating leukocytes of breast cancer patients with T1 to T2 breast tumors in an attempt to correlate phenotypical markers of tumor-infiltrating leukocytes with axillary lymph node status.PATIENTS AND METHODSPatient populationDuring the years 2003 and 2004, a consecutive series of 23 patients at the Department of Gynecology and Obstetrics of the Ribeirão Preto Medical School who presented with invasive breast carcinoma were included in the study for immunophenotyping the tumor-infiltrating lymphocytes. In all patients, tumor size was no larger than 50 mm and was strictly confined to breasts, without distant metastasis; cases with involvement of skin, hypodermis, or pectoral muscles or with deep fixation were excluded. All patients included in this study underwent curative surgery plus axillary lymph node dissection, and none of these patients had received preoperative antitumor therapy. The clinical and pathological characteristics of patients included for the immunophenotypic studies are summarized in <a class="elsevierStyleCrossRef" href="#tbl1">Table 1</a>.<elsevierMultimedia ident="tbl1"></elsevierMultimedia>Informed consent, approved by the Ethics Committee of the Ribeirão Preto Medical School Hospital, was obtained from patients for collecting the material in this study (Process HCRP no 2519/2003).Processing of tumor biopsy and preparation for flow cytometry analysisSamples of the primary tumor from the 23 patients were obtained aseptically at the time of biopsy. The main bulk of each tumor was sent for routine histology. A block of tumor measuring 5 x 5 mm fresh from the operating room was dissected away from necrotic and fatty tissue, minced into 1 to 3-mm3 chunks using sterile forceps and a scalpel, and placed in sterile RPMI 1640 (Sigma, Saint Louis, MO), containing collagenase type IV (1 g/L; Sigma, Saint Louis, MO), hyaluronidase type V (100 mg/mL; Sigma, Saint Louis, MO), and DNAase type IV (30,000 U/L; Sigma, Saint Louis, MO). Tumor digestion was performed for 40 minutes at 37o C in a sterile bottle. 10 mL of enzyme medium was added per 3 g of tumor chunks. Following the tumor digestion, the single-cell suspension was filtered through a tissue dissociator grid, and the resultant suspension was washed twice and submitted to immunofluorescent staining of cells for flow cytometry. No attempt was made to separate the tumor-infiltrating lymphocytes from the tumor cells, since many cells would be lost, and this might distort the proportions of the various mononuclear cells present within the infiltrate.Flow cytometry analysis of leukocyte infiltrateThe surface characteristics were determined by using the following preparations of monoclonal antibodies: CD3 FITC/CD19 PE, CD3 FITC/CD4 PE, CD3 FITC/CD8 PE, and CD16/56 PerCP (Becton Dickinson, Mountain View, CA), which allowed the lymphocytes be phenotyped as T cells, B cells, CD4+ T cells, CD8+ T cells, or NK cells, respectively. A 10 mL sample of a phycoerythrin (PE)-, fluorescein-isothiocyanate (FITC)-, or peridin-clorophyll-protein (PerCP)-conjugated antibody was added to 106 cells in 100 mL of phosphate-buffered saline (PBS). After an incubation time of 30 min at 4o C in darkness, cells were washed twice and resuspended in 500 mL PBS and then analyzed with a FACSort flow cytometer (Becton Dickinson, San Jose, CA). The cell samples were run through the flow cytometer, and 10,000 events were analyzed for each sample using Becton Dickinson’s CELL QUEST™ software on an Apple Mac G3 computer.Using the forward- and side-scatter (FSC and SSC) properties of lymphocytes in laser light, a gate was drawn around the lymphocytes to exclude tumor cells from further analysis. The relative proportions of the phenotypic subsets were measured using 4-quadrant analysis.Statistical analysisThe data of each group were submitted to the normality test of GraphPad Prism (version 3.00) of GraphPad Incorporated (San Diego, USA), and a gaussian distribution of data was verified. Data were expressed as the mean ± standard deviation, and the 2-tailed unpaired Student t test was used for comparing leukocyte infiltration between groups of patients with different lymph node status. Statistical significance was defined as P < 0.05.RESULTSAll patients were treated by lumpectomy with axillary lymph node dissection or modified radical mastectomy in accordance with our management protocol. The patients were women between 40 and 90 years of age (mean and median were 58 years) and included 7 premenopausal and 16 postmenopausal women. According to the pathological TNM classification of cancer staging, 11 of 23 tumors were classified as T1, and 12 of 23 as T2. Lymph node metastasis as determined by histological examination was noted in 10 of 23 cases, with the remaining 13 patients being lymph node negative.Histologically, 21 of 23 patients had tumors classified as infiltrating ductal carcinoma without special features, while the remaining 2 were classified as mucinous. Tumors with histology of ductal carcinoma were graded according to the Bloom and Richardson grading system,<a class="elsevierStyleCrossRef" href="#bib12">12</a> and there were a total of 11 ductal carcinomas classified as grade I, 8 as grade II, and 2 as grade III.The mean value for T-lymphocyte infiltration (CD3+ cells) was 24.72 ± 17.37%; for B-lymphocyte infiltration (CD19+ cells), 4.22 ± 6.27%; for NK cell-infiltration (CD16+/CD56+ cells), 4.41 ± 5.22%; and for CD4+ and CD8+ T-lymphocyte infiltration (CD3+/CD4+ and CD3+/CD8+), 12.43 ± 10.12% and 11.30 ± 15.09%, respectively.Comparing the two groups of patients—those with a presence vs those with an absence of lymph node metastasis—there was a statistically significant difference between groups regarding the mean values of T-lymphocyte and CD4+ T-lymphocyte infiltration (15.35 ± 2.36% and 8.41 ± 6.22% with absence of lymph node metastasis vs 36.90 ± 18.60% and 17.64 ± 12.05% with presence of lymph node metastasis, P = 0.001 and P = 0.02, respectively) (<a class="elsevierStyleCrossRef" href="#tbl2">Table 2</a>), indicating an association between infiltration by CD4+ T cells and axillary metastasis. There were no statistically significant differences between the means of other lymphocyte subsets for these groups (<a class="elsevierStyleCrossRef" href="#tbl2">Table 2</a>).<elsevierMultimedia ident="tbl2"></elsevierMultimedia>DISCUSSIONIn human breast cancer as well as in other solid tumors, isolating tumor-infiltrating lymphocytes is difficult. In the current study, we used dual-flow cytometry for accurate detection of selected lymphocyte subsets, especially the subpopulations of CD3+ tumor-infiltrating lymphocytes after enzyme-digestion method. In our study, the immunophenotyping of cell types revealed a familiar subdivision of lymphocytes. The tumor-infiltrating lymphocytes, like peripheral blood lymphocytes, consisted mainly of T cells expressing the CD3 antigen, and there was a relative paucity of tumor-infiltrating B lymphocytes and NK cells. The mechanisms by which T cells cause tumor elimination include direct lysis of tumor, recruitment of host cells that have a cytotoxic function, or secretion of cytokines that are either cytotoxic toward tumor or affect the tumor vasculature.<a class="elsevierStyleCrossRefs" href="#bib14">14–18</a> Despite findings that the T-cell immune response can kill tumors in situ, this response is frequently ineffective in eliminating the tumor.<a class="elsevierStyleCrossRefs" href="#bib14">14–18</a>There was little evidence of effectual action of tumor-infiltrating B lymphocytes against cancer. Few proteins expressed by tumor cells are truly tumor-specific; most antibodies produced will likely be directed against autoantigens, with a small percentage against tumor-specific antigens.<a class="elsevierStyleCrossRefs" href="#bib4">4–6,14</a> Another set of lymphocytes, NK cells, seems to have tumoricidal activity that is not dependent on prior sensitization. These are components of innate immunity, and pattern-recognition receptors and other cell-surface molecules are used to directly detect tumors.<a class="elsevierStyleCrossRefs" href="#bib15">15–17</a> Natural killer cells also monitor for the loss of MHC class I molecules from the surface of the tumor cells, which commonly occurs during carcinogenesis.<a class="elsevierStyleCrossRefs" href="#bib15">15,16,18</a> Most breast cancers display diminished MHC class I expression, making them particularly vulnerable to NK cell-mediated killing. However, our data showed that breast tumors are poorly infiltrated by NK cells compared to T cells, and other studies have shown that the loss of MHC is associated with T-cell infiltration instead of with NK-cell infiltration.<a class="elsevierStyleCrossRefs" href="#bib15">15,18</a>Adaptive immunity is mediated by antibodies and by CD4+ and CD8+ T cells, and it usually exploits an indirect pathway, termed cross-priming, to achieve initial recognition of cancers.<a class="elsevierStyleCrossRefs" href="#bib15">15–17</a> Accordingly, CD4+ and CD8+ T cells react with MHC-restricted tumor peptides derived from mutated proteins, aberrantly expressed gene products, and normal differentiation antigens that are produced by the cancer cells. Although specific immunity mediated by cytolytic T lymphocytes might have an anticancer role, the tumors escape from T-cell-based immune surveillance using various mechanisms, such as down regulation, mutation, or loss of HLA class I molecules.<a class="elsevierStyleCrossRefs" href="#bib3">3–6,15–18</a> In patients with lymph node metastasis, an increased mean percentage of tumor-infiltrating CD4+ T cells, but not CD8+ T cells, was seen. The relationship between tumor stage and T-lymphocyte infiltration has previously been demonstrated in patients with prostate, gallbladder, renal, colorectal, and breast cancer.<a class="elsevierStyleCrossRefs" href="#bib6">6,19–21</a>Nodal status as determined by pathologic examination of lymph nodes has repeatedly been shown to be the single most important predictor of survival in breast cancer.<a class="elsevierStyleCrossRefs" href="#bib11">11,12</a> Association between the intensity of infiltration by T CD4+ lymphocytes and positive axillary lymph nodes has been demonstrated, and these patients had a worse prognosis.<a class="elsevierStyleCrossRefs" href="#bib3">3–6,22,23</a> Wong et al<a class="elsevierStyleCrossRef" href="#bib23">23</a> demonstrated that the tumor-infiltrating lymphocytes of patients with positive lymph nodes had a greater tumoricidal activity, but this may be reflect the need for a more intense immune response in patients with tumor-involved nodes or that in a significant subgroup of breast cancer patients, tumor-infiltrating lymphocytes might create a favorable environment for the spreading of malignant cells.Several findings of previous studies could explain this association with worse prognosis. The tumor-infiltrating lymphocytes are able to produce and release vascular endothelial growth factor (VEGF) and basic fibroblastic growth factor, which can induce lymphangiogenesis and angiogenesis and consequently could permit the dissemination of cancer cells through lymphatics to regional lymph nodes.<a class="elsevierStyleCrossRefs" href="#bib24">24–28</a>Bernstein et al<a class="elsevierStyleCrossRef" href="#bib29">29</a> demonstrated that the aromatase (CYP19) gene is presented in tumor-infiltrating lymphocytes, and the presence of local oestrone formation could have some functional significance for the estrogen-dependent growth of breast cancer tissue, creating favorable environment for cancer cells. The presence of tumor-infiltrating lymphocytes in breast carcinomas and production of potentially immunoinhibitory cytokines such as IL-4, IL-10, and TGF-21 has been demonstrated; this production by tumor-infiltrating lymphocytes in breast cancers exceeded that detected in benign breast lesions, suggesting a role for tumor-infiltrating lymphocytes in immunosuppression, creating a mechanism of immune escape for the tumor.<a class="elsevierStyleCrossRef" href="#bib30">30</a>The matrix metalloproteinases are associated with the invasive properties of tumor cells, owing to their ability to degrade all major protein components of the extracellular matrix and basement membranes, stimulate cell proliferation, and modulate angiogenesis,<a class="elsevierStyleCrossRef" href="#bib31">31</a> and it has been shown that breast cancer cells can induce expression of matrix metalloproteinase-9 (MMP-9) in fibroblasts by tumor cell-derived TNF-α and TGF-β.<a class="elsevierStyleCrossRef" href="#bib32">31</a> The lymphocyte invasion of a tumor mass is of crucial importance in the host’s defense against the developing neoplasm, and has been shown that T lymphocytes constitutively produce small amounts of MMP-9, a finding supported by the normal leukocyte migration from the vascular compartment to sites of inflammation.<a class="elsevierStyleCrossRef" href="#bib33">33</a> However, Owen et al,<a class="elsevierStyleCrossRef" href="#bib34">34</a> evaluating the MMP-9 production by T cells from normal and mammary tumor-bearing mice, have shown that mammary tumor cells produce MMP-9 and the T cells from tumor-bearing animals constitutively produce higher levels of this enzyme and correlate with tumor growth. These observations suggest that tumor-infiltrating lymphocytes, regarded as evidence of a protective immune response against tumors, can promote angiogenesis and microvasculature remodeling. Thus, is tempting to speculate that these factors may promote neoplastic progression and dissemination throughout the tumor site.Our finding of an association of higher levels of tumor-infiltrating CD4+ T lymphocytes with lymph node involvement by metastasis may be explained by more recent studies showing that tumor-infiltrating lymphocytes are associated with vasculogenesis, immunoinhibitory cytokines, and intratumoral estrogen conversion. Although we recognize that the findings to date are based on a limited number of patients, our observations are supported by previous studies and could contribute importantly to the understanding of mechanisms that govern the interactions between lymphocytes and breast cancer." "textoCompletoSecciones" => array:1 [ "secciones" => array:8 [ 0 => array:2 [ "identificador" => "xpalclavsec1585084" "titulo" => "KEYWORDS" ] 1 => array:3 [ "identificador" => "xres1815431" "titulo" => "RESUMO" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "ceabs50" "titulo" => "INTRODUÇÃO:" ] 1 => array:2 [ "identificador" => "ceabs60" "titulo" => "MÉTODOS:" ] 2 => array:2 [ "identificador" => "ceabs70" "titulo" => "RESULTADOS:" ] 3 => array:2 [ "identificador" => "ceabs80" "titulo" => "CONCLUSÃO:" ] ] ] 2 => array:2 [ "identificador" => "xpalclavsec1585085" "titulo" => "UNITERMOS:" ] 3 => array:2 [ "identificador" => "cesec10" "titulo" => "INTRODUCTION" ] 4 => array:3 [ "identificador" => "cesec20" "titulo" => "PATIENTS AND METHODS" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "cesec30" "titulo" => "Patient population" ] 1 => array:2 [ "identificador" => "cesec40" "titulo" => "Processing of tumor biopsy and preparation for flow cytometry analysis" ] 2 => array:2 [ "identificador" => "cesec50" "titulo" => "Flow cytometry analysis of leukocyte infiltrate" ] 3 => array:2 [ "identificador" => "cesec60" "titulo" => "Statistical analysis" ] ] ] 5 => array:2 [ "identificador" => "cesec70" "titulo" => "RESULTS" ] 6 => array:2 [ "identificador" => "cesec80" "titulo" => "DISCUSSION" ] 7 => array:1 [ "titulo" => "REFERENCES" ] ] ] "pdfFichero" => "main.pdf" "tienePdf" => true "fechaRecibido" => "2006-02-04" "fechaAceptado" => "2006-02-20" "PalabrasClave" => array:2 [ "en" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "KEYWORDS" "identificador" => "xpalclavsec1585084" "palabras" => array:5 [ 0 => "Breast cancer" 1 => "Flow cytometry" 2 => "Lymphocytes" 3 => "CD4+ T lymphocytes" 4 => "Natural killer cells" ] ] ] "pt" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "UNITERMOS:" "identificador" => "xpalclavsec1585085" "palabras" => array:4 [ 0 => "Câncer de Mama" 1 => "Citometria de Fluxo" 2 => "Linfócitos" 3 => "Células Natural Killer" ] ] ] ] "tieneResumen" => true "resumen" => array:2 [ "en" => array:2 [ "resumen" => "BACKGROUND:The role of immune system in the pathogenesis and progression of breast cancer is a subject of controversy, and this stimulated us to investigate the association of the immunophenotype of tumor-infiltrating lymphocytes in early breast cancer with the spread of tumor cells to axillary lymph nodes. METHODS:Tumor samples from 23 patients with early breast cancer from the Department of Gynecology and Obstetrics of Ribeirão Preto Medical School (USP) were obtained at the time of biopsy and submitted to an enzyme-digestion procedure for the extraction of tumor-infiltrating lymphocytes. The lymphocytes extracted were analyzed by dual-color flow cytometry with monoclonal antibodies in these combinations: CD3 FITC/CD19 PE, CD3 FITC/CD4 PE, CD3 FITC/CD8 PE, and CD16/56 PerCP, which are specific for immunophenotyping of T and B lymphocytes, helper and cytotoxic T lymphocytes, and natural killer (NK) cells. The mean percentage of these cells was used for comparing groups of patients with or without lymph node metastasis. RESULTS:The mean value for T-lymphocyte infiltration was 24.72 ± 17.37%; for B-lymphocyte infiltration, 4.22 ± 6.27%; for NK-cell infiltration, 4.41 ± 5.22%, and for CD4+ and CD8+ T-lymphocyte infiltration, 12.43 ± 10.12% and 11.30 ± 15.09%, respectively. Only mean values of T- and CD4+ T-lymphocyte infiltration were higher in the group of patients with lymph node metastasis, while no differences were noted in the other lymphocyte subpopulations. CONCLUSION:The association of tumor-infiltrating CD4+ T lymphocytes with lymph node metastasis suggests a role for these cells in the spread of neoplasia to lymph nodes in patients with early breast cancer." "secciones" => array:4 [ 0 => array:2 [ "identificador" => "ceabs10" "titulo" => "BACKGROUND:" ] 1 => array:2 [ "identificador" => "ceabs20" "titulo" => "METHODS:" ] 2 => array:2 [ "identificador" => "ceabs30" "titulo" => "RESULTS:" ] 3 => array:2 [ "identificador" => "ceabs40" "titulo" => "CONCLUSION:" ] ] ] "pt" => array:3 [ "titulo" => "RESUMO" "resumen" => "INTRODUÇÃO:O papel do sistema imunológico na patogênese e progressão do câncer de mama ainda é controverso, e isto nos estimulou a verificar a associação do imunofenótipo dos linfócitos tumor infiltrantes do câncer de mama inicial com a disseminação de células tumorais para os linfonodos axilares. MÉTODOS:Amostras tumorais de 23 pacientes com câncer de mama inicial do Departamento de Ginecologia e Obstetrícia da Faculdade de Medicina de Ribeirão Preto (USP) foram obtidas no momento da biópsia e depois submetidas ao método de digestão enzimática para a extração dos linfócitos tumor infiltrantes. Os linfócitos extraídos foram analisados por citometria de fluxo com anticorpos monoclonais nas seguintes combinações: CD3 FITC/CD19 PE, CD3 FITC/CD4 PE, CD3 FITC/CD8 PE, e CD16/56 PerCP, específicos para imunofenotipagem de linfócitos T e B, linfócitos T helper, linfócitos citotóxicos, e células Natural Killer. Os valores médios destas subpopulações leucocitárias foram comparados entre grupos de pacientes com ou sem metástases linfonodais. RESULTADOS:O valor médio do infiltrado por linfócitos T foi 24,72±17,37%, para o infiltrado por linfócitos B foi 4,22±6,27%, e para o infiltrado por células Natural Killer foi 4,41±5,22%, e para o infiltrado por linfócitos T CD4+ e CD8+ foram, respectivamente, 12,43±10,12% e 11,30±15,09%. Os valores médios do infiltrado por células T e T CD4+ foram maiores no grupo de pacientes com metástase axilar, enquanto nas outras subpopulações nada foi encontrado. CONCLUSÃO:A associação dos linfócitos T CD4+ tumor infiltrantes com metástases linfonodais sugere um papel destas células na disseminação das células neoplásicas aos linfonodos dos pacientes com câncer de mama inicial." "secciones" => array:4 [ 0 => array:2 [ "identificador" => "ceabs50" "titulo" => "INTRODUÇÃO:" ] 1 => array:2 [ "identificador" => "ceabs60" "titulo" => "MÉTODOS:" ] 2 => array:2 [ "identificador" => "ceabs70" "titulo" => "RESULTADOS:" ] 3 => array:2 [ "identificador" => "ceabs80" "titulo" => "CONCLUSÃO:" ] ] ] ] "multimedia" => array:2 [ 0 => array:7 [ "identificador" => "tbl1" "etiqueta" => "Table 1" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "tabla" => array:2 [ "leyenda" => "(1) Lymph node status: number of lymph nodes involved by metastasis/total number of lymph nodes(2) pre: premenopausal; post: postmenopausal" "tablatextoimagen" => array:1 [ 0 => array:1 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col">Case \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col">Age \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col">Tumor Grade \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col">Tumor Size(cm) \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col">TNM \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col">Stage \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col">Lymph node status<a class="elsevierStyleCrossRef" href="#bib1">1</a> \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col">Hormone status<a class="elsevierStyleCrossRef" href="#bib2">2</a> \t\t\t\t\t\t\n \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">1 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">51 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">I \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">3.5 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">T2N0M0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">IIA \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">3/25 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Post \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">2 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">74 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">I \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">4.5 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">T2N0M0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">IIA \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0/19 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Post \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">3 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">44 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">I \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">2.0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">T1N2M0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">IIIA \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">7/33 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Pre \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">4 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">75 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">II \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">4.5 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">T2N1M0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">IIB \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0/16 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Post \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">5 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">70 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">II \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">2.0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">T1N0M0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">I \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0/18 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Post \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">6 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">80 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">III \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">4.0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">T2N1M0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">IIB \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">13/22 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Post \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">7 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">69 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">I \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">1.0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">T1N0M0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">I \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0/18 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Post \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">8 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">90 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">II \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">1.6 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">T1N0M0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">I \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0/21 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Post \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">9 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">71 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Mucinous \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">2.5 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">T2N0M0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">IIA \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0/15 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Post \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">10 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">45 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Mucinous \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">3.0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">T2N0M0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">IIA \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">3/12 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Pre \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">11 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">59 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">II \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">2.5 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">T2N0M0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">IIA \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">1/17 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Post \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">12 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">64 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">I \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">1.8 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">T1N0M0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">I \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0/28 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Post \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">13 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">53 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">I \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">3.0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">T2N0M0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">IIA \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0/17 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Post \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">14 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">40 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">I \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">3.0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">T2N0M0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">IIA \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">1/13 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Pre \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">15 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">58 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">III \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">3.0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">T2N2M0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">IIIA \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">14/28 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Post \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">16 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">51 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">II \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">4.0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">T2N0M0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">IIA \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0/23 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Pre \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">17 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">50 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">II \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">2.0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">T1N0M0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">I \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">12/27 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Pre \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">18 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">48 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">II \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">2.0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">T1N1M0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">IIA \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">4/15 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Post \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">19 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">42 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">I \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">1.0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">T1N0M0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">I \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0/12 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Pre \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">20 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">42 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">I \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">4.0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">T2N0M0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">IIA \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0/12 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Pre \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">21 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">63 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">II \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">2.0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">T1N2M0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">IIIA \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">8/25 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Post \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">22 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">57 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">I \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">1.5 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">T1N0M0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">I \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0/9 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Post \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">23 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">59 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">I \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">2.0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">T1N0M0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">I \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0/21 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">Post \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] ] ] ] "descripcion" => array:1 [ "en" => "Clinical and pathological characteristics of patients with breast cancer" ] ] 1 => array:7 [ "identificador" => "tbl2" "etiqueta" => "Table 2" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "tabla" => array:2 [ "leyenda" => "a. All data are expressed as media percentages followed by standard deviation; b. P < 0.05; c. P > 0.05; d. P = 0.001; e. P = 0.02" "tablatextoimagen" => array:1 [ 0 => array:1 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col">Subpopulations \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col">Positive lymph node metastasis \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t" scope="col">Negative lymph node metastasis \t\t\t\t\t\t\n \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">T lymphocyte \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">36.90 ± 18.60b.d \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">15.35 ± 8.51 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">B lymphocyte \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">6.77 ± 8.42b.c \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">2.51 ± 3.05 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">CD4+ T cell \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">17.64 ± 12.05b.e \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">8.41 ± 6.22 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">CD8+ T cell \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">17.89 ± 11.50b.c \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">13.25 ± 15.20 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="\n \t\t\t\t\ttop\n \t\t\t\t">NK cell \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">4.70 ± 6.6b.c \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="\n \t\t\t\t\ttop\n \t\t\t\t">4.18 ± 4.10 \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] ] ] ] "descripcion" => array:1 [ "en" => "Subpopulations of Immunocytes in Tumor Tissue from Breast Carcinoma Specimens with Respect to Lymph Node Involvementa,b" ] ] ] "bibliografia" => array:2 [ "titulo" => "REFERENCES" "seccion" => array:1 [ 0 => array:2 [ "identificador" => "cebibsec10" "bibliografiaReferencia" => array:34 [ 0 => array:3 [ "identificador" => "bib1" "etiqueta" => "1" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Trends in cancer mortality in the Americas, 1970-2000" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:6 [ 0 => """ C Bosetti \n \t\t\t\t\t\t\t\t """ 1 => """ M Malvezzi \n \t\t\t\t\t\t\t\t """ 2 => """ L Chatenoud \n \t\t\t\t\t\t\t\t """ 3 => """ E Negri \n \t\t\t\t\t\t\t\t """ 4 => """ F Levi \n \t\t\t\t\t\t\t\t """ 5 => """ C La Vecchia \n \t\t\t\t\t\t\t\t """ ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.1093/humrep/mdi086" "Revista" => array:6 [ "tituloSerie" => "Ann Oncol" "fecha" => "2005" "volumen" => "16" "paginaInicial" => "489" "paginaFinal" => "511" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/15668262" "web" => "Medline" ] ] ] ] ] ] ] ] 1 => array:3 [ "identificador" => "bib2" "etiqueta" => "2" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Lymphocyte infiltrates as a prognostic variable in female breast cancer" "autores" => array:1 [ 0 => array:2 [ "etal" => true "autores" => array:6 [ 0 => """ S Aaltomaa \n \t\t\t\t\t\t\t\t """ 1 => """ P Lipponen \n \t\t\t\t\t\t\t\t """ 2 => """ M Eskelinen \n \t\t\t\t\t\t\t\t """ 3 => """ VM Kosma \n \t\t\t\t\t\t\t\t """ 4 => """ S Marin \n \t\t\t\t\t\t\t\t """ 5 => """ E Alhava \n 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ORIGINAL RESEARCH

Alexandre Henrique Macchettia, Heitor Ricardo Cosiski Maranaa, João Santana Silvab, Jurandyr Moreira de Andradea, Alfredo Ribeiro-Silvac, Sérgio Bighettia

a Department of Gynecology and Obstetrics, Breast Service, Ribeirão Preto Medical School, University of São Paulo – São Paulo/SP, Brazil.

b Department of Immunology and Biochemistry, Ribeirão Preto Medical School, University of São Paulo - São Paulo/SP, Brazil.

c Department of Pathology, Ribeirão Preto Medical School, University of São Paulo - São Paulo/SP, Brazil.

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    "titulo" => "TUMOR-INFILTRATING CD4<span class="elsevierStyleSup">&#43;</span> T LYMPHOCYTES IN EARLY BREAST CANCER REFLECT LYMPH NODE INVOLVEMENT"
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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="cesec10" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle120">INTRODUCTION</span><p id="para10" class="elsevierStylePara elsevierViewall">Breast cancer is the most common neoplasm in women&#44; and several studies have documented that these tumors are infiltrated by a heterogeneous population of immune cells&#44; consisting of different proportions of T cells&#44; B cells&#44; natural killer &#40;NK&#41; cells&#44; and macrophages&#46;<a class="elsevierStyleCrossRefs" href="#bib1"><span class="elsevierStyleSup">1&#8211;4</span></a> Despite the presence of the immune response&#44; many breast tumors progressively grow and spread&#44; calling into question the role of tumor-infiltrating leukocytes in the tumor microenvironment&#46;<a class="elsevierStyleCrossRef" href="#bib5"><span class="elsevierStyleSup">5</span></a></p><p id="para20" class="elsevierStylePara elsevierViewall">There is no definitive conclusion regarding the efficacy of T cell-dependent immune mechanisms or regarding the correlation between the extent and type of lymphocyte infiltration and the tumor progression in most subtypes of carcinoma of the breast&#46;<a class="elsevierStyleCrossRefs" href="#bib4"><span class="elsevierStyleSup">4&#44;5</span></a> These interrelationships could be considered to be important in view of the role played by the immune system in the pathogenesis and progression of the breast cancer&#46;<a class="elsevierStyleCrossRef" href="#bib4"><span class="elsevierStyleSup">4</span></a></p><p id="para30" class="elsevierStylePara elsevierViewall">Previous studies have shown that the function of tumor-infiltrating lymphocytes is impaired by inhibitory cytokines&#44;<a class="elsevierStyleCrossRef" href="#bib6"><span class="elsevierStyleSup">6</span></a> increased regulatory T lymphocyte activity&#44;<a class="elsevierStyleCrossRef" href="#bib7"><span class="elsevierStyleSup">7</span></a> tumor cell MHC molecule alterations&#44;<a class="elsevierStyleCrossRef" href="#bib8"><span class="elsevierStyleSup">8</span></a> and aberrant Fas lig- and expression&#44;<a class="elsevierStyleCrossRef" href="#bib9"><span class="elsevierStyleSup">9</span></a> among others&#46;</p><p id="para40" class="elsevierStylePara elsevierViewall">Nodal status as determined by pathologic examination of lymph nodes has repeatedly been shown to be the single most important predictor of survival in breast cancer&#46; Even patients with very small tumors and minimal involvement of a single axillary node have a significantly worse prognosis compared with patients with no axillary node involvement&#59; there is a direct relationship between the number of involved axillary nodes and the risk for distant recurrence&#46;<a class="elsevierStyleCrossRefs" href="#bib10"><span class="elsevierStyleSup">10&#44;11</span></a></p><p id="para50" class="elsevierStylePara elsevierViewall">Collectively&#44; these findings have led to increased interest in the role of tumor-infiltrating leukocytes in the regulation of tumor development&#46; In our study&#44; we analyzed by flow cytometry the tumor-infiltrating leukocytes of breast cancer patients with T1 to T2 breast tumors in an attempt to correlate phenotypical markers of tumor-infiltrating leukocytes with axillary lymph node status&#46;</p></span><span id="cesec20" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle130">PATIENTS AND METHODS</span><span id="cesec30" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle140">Patient population</span><p id="para60" class="elsevierStylePara elsevierViewall">During the years 2003 and 2004&#44; a consecutive series of 23 patients at the Department of Gynecology and Obstetrics of the Ribeir&#227;o Preto Medical School who presented with invasive breast carcinoma were included in the study for immunophenotyping the tumor-infiltrating lymphocytes&#46; In all patients&#44; tumor size was no larger than 50 mm and was strictly confined to breasts&#44; without distant metastasis&#59; cases with involvement of skin&#44; hypodermis&#44; or pectoral muscles or with deep fixation were excluded&#46; All patients included in this study underwent curative surgery plus axillary lymph node dissection&#44; and none of these patients had received preoperative antitumor therapy&#46; The clinical and pathological characteristics of patients included for the immunophenotypic studies are summarized in <a class="elsevierStyleCrossRef" href="#tbl1">Table 1</a>&#46;</p><elsevierMultimedia ident="tbl1"></elsevierMultimedia><p id="para70" class="elsevierStylePara elsevierViewall">Informed consent&#44; approved by the Ethics Committee of the Ribeir&#227;o Preto Medical School Hospital&#44; was obtained from patients for collecting the material in this study &#40;Process HCRP n<span class="elsevierStyleSup">o</span> 2519&#47;2003&#41;&#46;</p></span><span id="cesec40" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle150">Processing of tumor biopsy and preparation for flow cytometry analysis</span><p id="para80" class="elsevierStylePara elsevierViewall">Samples of the primary tumor from the 23 patients were obtained aseptically at the time of biopsy&#46; The main bulk of each tumor was sent for routine histology&#46; A block of tumor measuring 5 x 5 mm fresh from the operating room was dissected away from necrotic and fatty tissue&#44; minced into 1 to 3-mm<span class="elsevierStyleSup">3</span> chunks using sterile forceps and a scalpel&#44; and placed in sterile RPMI 1640 &#40;Sigma&#44; Saint Louis&#44; MO&#41;&#44; containing collagenase type IV &#40;1 g&#47;L&#59; Sigma&#44; Saint Louis&#44; MO&#41;&#44; hyaluronidase type V &#40;100 mg&#47;mL&#59; Sigma&#44; Saint Louis&#44; MO&#41;&#44; and DNAase type IV &#40;30&#44;000 U&#47;L&#59; Sigma&#44; Saint Louis&#44; MO&#41;&#46; Tumor digestion was performed for 40 minutes at 37<span class="elsevierStyleSup">o</span> C in a sterile bottle&#46; 10 mL of enzyme medium was added per 3 g of tumor chunks&#46; Following the tumor digestion&#44; the single-cell suspension was filtered through a tissue dissociator grid&#44; and the resultant suspension was washed twice and submitted to immunofluorescent staining of cells for flow cytometry&#46; No attempt was made to separate the tumor-infiltrating lymphocytes from the tumor cells&#44; since many cells would be lost&#44; and this might distort the proportions of the various mononuclear cells present within the infiltrate&#46;</p></span><span id="cesec50" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle160">Flow cytometry analysis of leukocyte infiltrate</span><p id="para90" class="elsevierStylePara elsevierViewall">The surface characteristics were determined by using the following preparations of monoclonal antibodies&#58; CD3 FITC&#47;CD19 PE&#44; CD3 FITC&#47;CD4 PE&#44; CD3 FITC&#47;CD8 PE&#44; and CD16&#47;56 PerCP &#40;Becton Dickinson&#44; Mountain View&#44; CA&#41;&#44; which allowed the lymphocytes be phenotyped as T cells&#44; B cells&#44; CD4<span class="elsevierStyleSup">&#43;</span> T cells&#44; CD8<span class="elsevierStyleSup">&#43;</span> T cells&#44; or NK cells&#44; respectively&#46; A 10 mL sample of a phycoerythrin &#40;PE&#41;-&#44; fluorescein-isothiocyanate &#40;FITC&#41;-&#44; or peridin-clorophyll-protein &#40;PerCP&#41;-conjugated antibody was added to 10<span class="elsevierStyleSup">6</span> cells in 100 mL of phosphate-buffered saline &#40;PBS&#41;&#46; After an incubation time of 30 min at 4<span class="elsevierStyleSup">o</span> C in darkness&#44; cells were washed twice and resuspended in 500 mL PBS and then analyzed with a FACSort flow cytometer &#40;Becton Dickinson&#44; San Jose&#44; CA&#41;&#46; The cell samples were run through the flow cytometer&#44; and 10&#44;000 events were analyzed for each sample using Becton Dickinson&#8217;s CELL QUEST&#8482; software on an Apple Mac G3 computer&#46;</p><p id="para100" class="elsevierStylePara elsevierViewall">Using the forward- and side-scatter &#40;FSC and SSC&#41; properties of lymphocytes in laser light&#44; a gate was drawn around the lymphocytes to exclude tumor cells from further analysis&#46; The relative proportions of the phenotypic subsets were measured using 4-quadrant analysis&#46;</p></span><span id="cesec60" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle170">Statistical analysis</span><p id="para110" class="elsevierStylePara elsevierViewall">The data of each group were submitted to the normality test of GraphPad Prism &#40;version 3&#46;00&#41; of GraphPad Incorporated &#40;San Diego&#44; USA&#41;&#44; and a gaussian distribution of data was verified&#46; Data were expressed as the mean &#177; standard deviation&#44; and the 2-tailed unpaired Student <span class="elsevierStyleItalic">t</span> test was used for comparing leukocyte infiltration between groups of patients with different lymph node status&#46; Statistical significance was defined as <span class="elsevierStyleItalic">P</span> &#60; 0&#46;05&#46;</p></span></span><span id="cesec70" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle180">RESULTS</span><p id="para120" class="elsevierStylePara elsevierViewall">All patients were treated by lumpectomy with axillary lymph node dissection or modified radical mastectomy in accordance with our management protocol&#46; The patients were women between 40 and 90 years of age &#40;mean and median were 58 years&#41; and included 7 premenopausal and 16 postmenopausal women&#46; According to the pathological TNM classification of cancer staging&#44; 11 of 23 tumors were classified as T1&#44; and 12 of 23 as T2&#46; Lymph node metastasis as determined by histological examination was noted in 10 of 23 cases&#44; with the remaining 13 patients being lymph node negative&#46;</p><p id="para130" class="elsevierStylePara elsevierViewall">Histologically&#44; 21 of 23 patients had tumors classified as infiltrating ductal carcinoma without special features&#44; while the remaining 2 were classified as mucinous&#46; Tumors with histology of ductal carcinoma were graded according to the Bloom and Richardson grading system&#44;<a class="elsevierStyleCrossRef" href="#bib12"><span class="elsevierStyleSup">12</span></a> and there were a total of 11 ductal carcinomas classified as grade I&#44; 8 as grade II&#44; and 2 as grade III&#46;</p><p id="para140" class="elsevierStylePara elsevierViewall">The mean value for T-lymphocyte infiltration &#40;CD3<span class="elsevierStyleSup">&#43;</span> cells&#41; was 24&#46;72 &#177; 17&#46;37&#37;&#59; for B-lymphocyte infiltration &#40;CD19<span class="elsevierStyleSup">&#43;</span> cells&#41;&#44; 4&#46;22 &#177; 6&#46;27&#37;&#59; for NK cell-infiltration &#40;CD16&#43;&#47;CD56<span class="elsevierStyleSup">&#43;</span> cells&#41;&#44; 4&#46;41 &#177; 5&#46;22&#37;&#59; and for CD4<span class="elsevierStyleSup">&#43;</span> and CD8<span class="elsevierStyleSup">&#43;</span> T-lymphocyte infiltration &#40;CD3<span class="elsevierStyleSup">&#43;</span>&#47;CD4<span class="elsevierStyleSup">&#43;</span> and CD3<span class="elsevierStyleSup">&#43;</span>&#47;CD8&#43;&#41;&#44; 12&#46;43 &#177; 10&#46;12&#37; and 11&#46;30 &#177; 15&#46;09&#37;&#44; respectively&#46;</p><p id="para150" class="elsevierStylePara elsevierViewall">Comparing the two groups of patients&#8212;those with a presence vs those with an absence of lymph node metastasis&#8212;there was a statistically significant difference between groups regarding the mean values of T-lymphocyte and CD4&#43; T-lymphocyte infiltration &#40;15&#46;35 &#177; 2&#46;36&#37; and 8&#46;41 &#177; 6&#46;22&#37; with absence of lymph node metastasis vs 36&#46;90 &#177; 18&#46;60&#37; and 17&#46;64 &#177; 12&#46;05&#37; with presence of lymph node metastasis&#44; <span class="elsevierStyleItalic">P</span> &#61; 0&#46;001 and <span class="elsevierStyleItalic">P</span> &#61; 0&#46;02&#44; respectively&#41; &#40;<a class="elsevierStyleCrossRef" href="#tbl2">Table 2</a>&#41;&#44; indicating an association between infiltration by CD4<span class="elsevierStyleSup">&#43;</span> T cells and axillary metastasis&#46; There were no statistically significant differences between the means of other lymphocyte subsets for these groups &#40;<a class="elsevierStyleCrossRef" href="#tbl2">Table 2</a>&#41;&#46;</p><elsevierMultimedia ident="tbl2"></elsevierMultimedia></span><span id="cesec80" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle190">DISCUSSION</span><p id="para160" class="elsevierStylePara elsevierViewall">In human breast cancer as well as in other solid tumors&#44; isolating tumor-infiltrating lymphocytes is difficult&#46; In the current study&#44; we used dual-flow cytometry for accurate detection of selected lymphocyte subsets&#44; especially the subpopulations of CD3<span class="elsevierStyleSup">&#43;</span> tumor-infiltrating lymphocytes after enzyme-digestion method&#46; In our study&#44; the immunophenotyping of cell types revealed a familiar subdivision of lymphocytes&#46; The tumor-infiltrating lymphocytes&#44; like peripheral blood lymphocytes&#44; consisted mainly of T cells expressing the CD3 antigen&#44; and there was a relative paucity of tumor-infiltrating B lymphocytes and NK cells&#46; The mechanisms by which T cells cause tumor elimination include direct lysis of tumor&#44; recruitment of host cells that have a cytotoxic function&#44; or secretion of cytokines that are either cytotoxic toward tumor or affect the tumor vasculature&#46;<a class="elsevierStyleCrossRefs" href="#bib14"><span class="elsevierStyleSup">14&#8211;18</span></a> Despite findings that the T-cell immune response can kill tumors in situ&#44; this response is frequently ineffective in eliminating the tumor&#46;<a class="elsevierStyleCrossRefs" href="#bib14"><span class="elsevierStyleSup">14&#8211;18</span></a></p><p id="para170" class="elsevierStylePara elsevierViewall">There was little evidence of effectual action of tumor-infiltrating B lymphocytes against cancer&#46; Few proteins expressed by tumor cells are truly tumor-specific&#59; most antibodies produced will likely be directed against autoantigens&#44; with a small percentage against tumor-specific antigens&#46;<a class="elsevierStyleCrossRefs" href="#bib4"><span class="elsevierStyleSup">4&#8211;6&#44;14</span></a> Another set of lymphocytes&#44; NK cells&#44; seems to have tumoricidal activity that is not dependent on prior sensitization&#46; These are components of innate immunity&#44; and pattern-recognition receptors and other cell-surface molecules are used to directly detect tumors&#46;<a class="elsevierStyleCrossRefs" href="#bib15"><span class="elsevierStyleSup">15&#8211;17</span></a> Natural killer cells also monitor for the loss of MHC class I molecules from the surface of the tumor cells&#44; which commonly occurs during carcinogenesis&#46;<a class="elsevierStyleCrossRefs" href="#bib15"><span class="elsevierStyleSup">15&#44;16&#44;18</span></a> Most breast cancers display diminished MHC class I expression&#44; making them particularly vulnerable to NK cell-mediated killing&#46; However&#44; our data showed that breast tumors are poorly infiltrated by NK cells compared to T cells&#44; and other studies have shown that the loss of MHC is associated with T-cell infiltration instead of with NK-cell infiltration&#46;<a class="elsevierStyleCrossRefs" href="#bib15"><span class="elsevierStyleSup">15&#44;18</span></a></p><p id="para180" class="elsevierStylePara elsevierViewall">Adaptive immunity is mediated by antibodies and by CD4<span class="elsevierStyleSup">&#43;</span> and CD8<span class="elsevierStyleSup">&#43;</span> T cells&#44; and it usually exploits an indirect pathway&#44; termed cross-priming&#44; to achieve initial recognition of cancers&#46;<a class="elsevierStyleCrossRefs" href="#bib15"><span class="elsevierStyleSup">15&#8211;17</span></a> Accordingly&#44; CD4&#43; and CD8&#43; T cells react with MHC-restricted tumor peptides derived from mutated proteins&#44; aberrantly expressed gene products&#44; and normal differentiation antigens that are produced by the cancer cells&#46; Although specific immunity mediated by cytolytic T lymphocytes might have an anticancer role&#44; the tumors escape from T-cell-based immune surveillance using various mechanisms&#44; such as down regulation&#44; mutation&#44; or loss of HLA class I molecules&#46;<a class="elsevierStyleCrossRefs" href="#bib3"><span class="elsevierStyleSup">3&#8211;6&#44;15&#8211;18</span></a> In patients with lymph node metastasis&#44; an increased mean percentage of tumor-infiltrating CD4<span class="elsevierStyleSup">&#43;</span> T cells&#44; but not CD8<span class="elsevierStyleSup">&#43;</span> T cells&#44; was seen&#46; The relationship between tumor stage and T-lymphocyte infiltration has previously been demonstrated in patients with prostate&#44; gallbladder&#44; renal&#44; colorectal&#44; and breast cancer&#46;<a class="elsevierStyleCrossRefs" href="#bib6"><span class="elsevierStyleSup">6&#44;19&#8211;21</span></a></p><p id="para190" class="elsevierStylePara elsevierViewall">Nodal status as determined by pathologic examination of lymph nodes has repeatedly been shown to be the single most important predictor of survival in breast cancer&#46;<a class="elsevierStyleCrossRefs" href="#bib11"><span class="elsevierStyleSup">11&#44;12</span></a> Association between the intensity of infiltration by T CD4<span class="elsevierStyleSup">&#43;</span> lymphocytes and positive axillary lymph nodes has been demonstrated&#44; and these patients had a worse prognosis&#46;<a class="elsevierStyleCrossRefs" href="#bib3"><span class="elsevierStyleSup">3&#8211;6&#44;22&#44;23</span></a> Wong et al<a class="elsevierStyleCrossRef" href="#bib23"><span class="elsevierStyleSup">23</span></a> demonstrated that the tumor-infiltrating lymphocytes of patients with positive lymph nodes had a greater tumoricidal activity&#44; but this may be reflect the need for a more intense immune response in patients with tumor-involved nodes or that in a significant subgroup of breast cancer patients&#44; tumor-infiltrating lymphocytes might create a favorable environment for the spreading of malignant cells&#46;</p><p id="para200" class="elsevierStylePara elsevierViewall">Several findings of previous studies could explain this association with worse prognosis&#46; The tumor-infiltrating lymphocytes are able to produce and release vascular endothelial growth factor &#40;VEGF&#41; and basic fibroblastic growth factor&#44; which can induce lymphangiogenesis and angiogenesis and consequently could permit the dissemination of cancer cells through lymphatics to regional lymph nodes&#46;<a class="elsevierStyleCrossRefs" href="#bib24"><span class="elsevierStyleSup">24&#8211;28</span></a></p><p id="para210" class="elsevierStylePara elsevierViewall">Bernstein et al<a class="elsevierStyleCrossRef" href="#bib29"><span class="elsevierStyleSup">29</span></a> demonstrated that the aromatase &#40;CYP19&#41; gene is presented in tumor-infiltrating lymphocytes&#44; and the presence of local oestrone formation could have some functional significance for the estrogen-dependent growth of breast cancer tissue&#44; creating favorable environment for cancer cells&#46; The presence of tumor-infiltrating lymphocytes in breast carcinomas and production of potentially immunoinhibitory cytokines such as IL-4&#44; IL-10&#44; and TGF-<span class="elsevierStyleSup">2</span>1 has been demonstrated&#59; this production by tumor-infiltrating lymphocytes in breast cancers exceeded that detected in benign breast lesions&#44; suggesting a role for tumor-infiltrating lymphocytes in immunosuppression&#44; creating a mechanism of immune escape for the tumor&#46;<a class="elsevierStyleCrossRef" href="#bib30"><span class="elsevierStyleSup">30</span></a></p><p id="para220" class="elsevierStylePara elsevierViewall">The matrix metalloproteinases are associated with the invasive properties of tumor cells&#44; owing to their ability to degrade all major protein components of the extracellular matrix and basement membranes&#44; stimulate cell proliferation&#44; and modulate angiogenesis&#44;<a class="elsevierStyleCrossRef" href="#bib31"><span class="elsevierStyleSup">31</span></a> and it has been shown that breast cancer cells can induce expression of matrix metalloproteinase-9 &#40;MMP-9&#41; in fibroblasts by tumor cell-derived TNF-&#945; and TGF-&#946;&#46;<a class="elsevierStyleCrossRef" href="#bib32"><span class="elsevierStyleSup">31</span></a> The lymphocyte invasion of a tumor mass is of crucial importance in the host&#8217;s defense against the developing neoplasm&#44; and has been shown that T lymphocytes constitutively produce small amounts of MMP-9&#44; a finding supported by the normal leukocyte migration from the vascular compartment to sites of inflammation&#46;<a class="elsevierStyleCrossRef" href="#bib33"><span class="elsevierStyleSup">33</span></a> However&#44; Owen et al&#44;<a class="elsevierStyleCrossRef" href="#bib34"><span class="elsevierStyleSup">34</span></a> evaluating the MMP-9 production by T cells from normal and mammary tumor-bearing mice&#44; have shown that mammary tumor cells produce MMP-9 and the T cells from tumor-bearing animals constitutively produce higher levels of this enzyme and correlate with tumor growth&#46; These observations suggest that tumor-infiltrating lymphocytes&#44; regarded as evidence of a protective immune response against tumors&#44; can promote angiogenesis and microvasculature remodeling&#46; Thus&#44; is tempting to speculate that these factors may promote neoplastic progression and dissemination throughout the tumor site&#46;</p><p id="para230" class="elsevierStylePara elsevierViewall">Our finding of an association of higher levels of tumor-infiltrating CD4<span class="elsevierStyleSup">&#43;</span> T lymphocytes with lymph node involvement by metastasis may be explained by more recent studies showing that tumor-infiltrating lymphocytes are associated with vasculogenesis&#44; immunoinhibitory cytokines&#44; and intratumoral estrogen conversion&#46; Although we recognize that the findings to date are based on a limited number of patients&#44; our observations are supported by previous studies and could contribute importantly to the understanding of mechanisms that govern the interactions between lymphocytes and breast cancer&#46;</p></span></span>"
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          "titulo" => "PATIENTS AND METHODS"
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              "titulo" => "Patient population"
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              "titulo" => "Processing of tumor biopsy and preparation for flow cytometry analysis"
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              "identificador" => "cesec50"
              "titulo" => "Flow cytometry analysis of leukocyte infiltrate"
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              "identificador" => "cesec60"
              "titulo" => "Statistical analysis"
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    "fechaRecibido" => "2006-02-04"
    "fechaAceptado" => "2006-02-20"
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          "clase" => "keyword"
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          "identificador" => "xpalclavsec1585084"
          "palabras" => array:5 [
            0 => "Breast cancer"
            1 => "Flow cytometry"
            2 => "Lymphocytes"
            3 => "CD4&#43; T lymphocytes"
            4 => "Natural killer cells"
          ]
        ]
      ]
      "pt" => array:1 [
        0 => array:4 [
          "clase" => "keyword"
          "titulo" => "UNITERMOS&#58;"
          "identificador" => "xpalclavsec1585085"
          "palabras" => array:4 [
            0 => "C&#226;ncer de Mama"
            1 => "Citometria de Fluxo"
            2 => "Linf&#243;citos"
            3 => "C&#233;lulas Natural Killer"
          ]
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        "resumen" => "<span id="ceabs10" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle10">BACKGROUND&#58;</span><p id="spara60" class="elsevierStyleSimplePara elsevierViewall">The role of immune system in the pathogenesis and progression of breast cancer is a subject of controversy&#44; and this stimulated us to investigate the association of the immunophenotype of tumor-infiltrating lymphocytes in early breast cancer with the spread of tumor cells to axillary lymph nodes&#46;</p></span> <span id="ceabs20" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle20">METHODS&#58;</span><p id="spara70" class="elsevierStyleSimplePara elsevierViewall">Tumor samples from 23 patients with early breast cancer from the Department of Gynecology and Obstetrics of Ribeir&#227;o Preto Medical School &#40;USP&#41; were obtained at the time of biopsy and submitted to an enzyme-digestion procedure for the extraction of tumor-infiltrating lymphocytes&#46; The lymphocytes extracted were analyzed by dual-color flow cytometry with monoclonal antibodies in these combinations&#58; CD3 FITC&#47;CD19 PE&#44; CD3 FITC&#47;CD4 PE&#44; CD3 FITC&#47;CD8 PE&#44; and CD16&#47;56 PerCP&#44; which are specific for immunophenotyping of T and B lymphocytes&#44; helper and cytotoxic T lymphocytes&#44; and natural killer &#40;NK&#41; cells&#46; The mean percentage of these cells was used for comparing groups of patients with or without lymph node metastasis&#46;</p></span> <span id="ceabs30" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle30">RESULTS&#58;</span><p id="spara80" class="elsevierStyleSimplePara elsevierViewall">The mean value for T-lymphocyte infiltration was 24&#46;72 &#177; 17&#46;37&#37;&#59; for B-lymphocyte infiltration&#44; 4&#46;22 &#177; 6&#46;27&#37;&#59; for NK-cell infiltration&#44; 4&#46;41 &#177; 5&#46;22&#37;&#44; and for CD4&#43; and CD8&#43; T-lymphocyte infiltration&#44; 12&#46;43 &#177; 10&#46;12&#37; and 11&#46;30 &#177; 15&#46;09&#37;&#44; respectively&#46; Only mean values of T- and CD4<span class="elsevierStyleSup">&#43;</span> T-lymphocyte infiltration were higher in the group of patients with lymph node metastasis&#44; while no differences were noted in the other lymphocyte subpopulations&#46;</p></span> <span id="ceabs40" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle40">CONCLUSION&#58;</span><p id="spara90" class="elsevierStyleSimplePara elsevierViewall">The association of tumor-infiltrating CD4&#43; T lymphocytes with lymph node metastasis suggests a role for these cells in the spread of neoplasia to lymph nodes in patients with early breast cancer&#46;</p></span>"
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            "titulo" => "BACKGROUND&#58;"
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            "titulo" => "METHODS&#58;"
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          2 => array:2 [
            "identificador" => "ceabs30"
            "titulo" => "RESULTS&#58;"
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            "titulo" => "CONCLUSION&#58;"
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        "titulo" => "RESUMO"
        "resumen" => "<span id="ceabs50" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle60">INTRODU&#199;&#195;O&#58;</span><p id="spara100" class="elsevierStyleSimplePara elsevierViewall">O papel do sistema imunol&#243;gico na patog&#234;nese e progress&#227;o do c&#226;ncer de mama ainda &#233; controverso&#44; e isto nos estimulou a verificar a associa&#231;&#227;o do imunofen&#243;tipo dos linf&#243;citos tumor infiltrantes do c&#226;ncer de mama inicial com a dissemina&#231;&#227;o de c&#233;lulas tumorais para os linfonodos axilares&#46;</p></span> <span id="ceabs60" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle70">M&#201;TODOS&#58;</span><p id="spara110" class="elsevierStyleSimplePara elsevierViewall">Amostras tumorais de 23 pacientes com c&#226;ncer de mama inicial do Departamento de Ginecologia e Obstetr&#237;cia da Faculdade de Medicina de Ribeir&#227;o Preto &#40;USP&#41; foram obtidas no momento da bi&#243;psia e depois submetidas ao m&#233;todo de digest&#227;o enzim&#225;tica para a extra&#231;&#227;o dos linf&#243;citos tumor infiltrantes&#46; Os linf&#243;citos extra&#237;dos foram analisados por citometria de fluxo com anticorpos monoclonais nas seguintes combina&#231;&#245;es&#58; CD3 FITC&#47;CD19 PE&#44; CD3 FITC&#47;CD4 PE&#44; CD3 FITC&#47;CD8 PE&#44; e CD16&#47;56 PerCP&#44; espec&#237;ficos para imunofenotipagem de linf&#243;citos T e B&#44; linf&#243;citos T <span class="elsevierStyleItalic">helper&#44;</span> linf&#243;citos citot&#243;xicos&#44; e c&#233;lulas <span class="elsevierStyleItalic">Natural Killer&#46;</span> Os valores m&#233;dios destas subpopula&#231;&#245;es leucocit&#225;rias foram comparados entre grupos de pacientes com ou sem met&#225;stases linfonodais&#46;</p></span> <span id="ceabs70" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle80">RESULTADOS&#58;</span><p id="spara120" class="elsevierStyleSimplePara elsevierViewall">O valor m&#233;dio do infiltrado por linf&#243;citos T foi 24&#44;72&#177;17&#44;37&#37;&#44; para o infiltrado por linf&#243;citos B foi 4&#44;22&#177;6&#44;27&#37;&#44; e para o infiltrado por c&#233;lulas <span class="elsevierStyleItalic">Natural Killer</span> foi 4&#44;41&#177;5&#44;22&#37;&#44; e para o infiltrado por linf&#243;citos T CD4<span class="elsevierStyleSup">&#43;</span> e CD8<span class="elsevierStyleSup">&#43;</span> foram&#44; respectivamente&#44; 12&#44;43&#177;10&#44;12&#37; e 11&#44;30&#177;15&#44;09&#37;&#46; Os valores m&#233;dios do infiltrado por c&#233;lulas T e T CD4<span class="elsevierStyleSup">&#43;</span> foram maiores no grupo de pacientes com met&#225;stase axilar&#44; enquanto nas outras subpopula&#231;&#245;es nada foi encontrado&#46;</p></span> <span id="ceabs80" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle90">CONCLUS&#195;O&#58;</span><p id="spara130" class="elsevierStyleSimplePara elsevierViewall">A associa&#231;&#227;o dos linf&#243;citos T CD4<span class="elsevierStyleSup">&#43;</span> tumor infiltrantes com met&#225;stases linfonodais sugere um papel destas c&#233;lulas na dissemina&#231;&#227;o das c&#233;lulas neopl&#225;sicas aos linfonodos dos pacientes com c&#226;ncer de mama inicial&#46;</p></span>"
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            "titulo" => "INTRODU&#199;&#195;O&#58;"
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            "titulo" => "M&#201;TODOS&#58;"
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            "titulo" => "RESULTADOS&#58;"
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            "titulo" => "CONCLUS&#195;O&#58;"
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        "tabla" => array:2 [
          "leyenda" => "<p id="spara20" class="elsevierStyleSimplePara elsevierViewall">&#40;1&#41; Lymph node status&#58; number of lymph nodes involved by metastasis&#47;total number of lymph nodes</p><p id="spara30" class="elsevierStyleSimplePara elsevierViewall">&#40;2&#41; pre&#58; premenopausal&#59; post&#58; postmenopausal</p>"
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                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col"><span class="elsevierStyleItalic">Case</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t" scope="col">Age&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col">Tumor Grade&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col">Tumor Size&#40;cm&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col">TNM&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col">Stage&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col">Lymph node status<a class="elsevierStyleCrossRef" href="#bib1"><span class="elsevierStyleSup">1</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
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                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col">Hormone status<a class="elsevierStyleCrossRef" href="#bib2"><span class="elsevierStyleSup">2</span></a>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">1&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">51&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">I&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">3&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t">T2N0M0&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">IIA&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">3&#47;25&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">Post&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">2&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">74&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">4&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t">T2N0M0&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">IIA&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">0&#47;19&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">3&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t">44&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">I&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">2&#46;0&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">T1N2M0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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                  \t\t\t\t">IIIA&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t">7&#47;33&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="center" valign="\n
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      "titulo" => "REFERENCES"
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                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Trends in cancer mortality in the Americas&#44; 1970-2000"
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                          "etal" => false
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                      "Revista" => array:6 [
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                        "fecha" => "2005"
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                            "web" => "Medline"
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                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Lymphocyte infiltrates as a prognostic variable in female breast cancer"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
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                            0 => """
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                    0 => array:2 [
                      "doi" => "10.1016/0959-8049(92)90134-n"
                      "Revista" => array:6 [
                        "tituloSerie" => "Eur J Cancer"
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                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/1524909"
                            "web" => "Medline"
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                0 => array:2 [
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                    0 => array:2 [
                      "titulo" => "The immunophenotype and activation status of the lymphocytic infiltrate in human breast cancers&#44; the role of the major histocompatibility complex in cell-mediated immune mechanisms&#44; and their association with prognostic indicators"
                      "autores" => array:1 [
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                            0 => """
                              SN Georgiannos \n
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                              """
                            1 => """
                              A Renaut \n
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                              """
                            2 => """
                              AW Goode \n
                              \t\t\t\t\t\t\t\t
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                            3 => """
                              M Sheaff \n
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                      "Revista" => array:6 [
                        "tituloSerie" => "Surgery"
                        "fecha" => "2003"
                        "volumen" => "134"
                        "paginaInicial" => "827"
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                      "titulo" => "Immunohistochemical evaluation of immune response in invasive ductal breast cancer of not-otherwise-specified type"
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                            0 => """
                              S Vgenopoulou \n
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                              """
                            1 => """
                              AC Lazaris \n
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                            4 => """
                              V Kyriakou \n
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                            5 => """
                              N Kavantzas \n
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                      "Revista" => array:6 [
                        "tituloSerie" => "Breast"
                        "fecha" => "2003"
                        "volumen" => "12"
                        "paginaInicial" => "172"
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                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/14659323"
                            "web" => "Medline"
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                      "titulo" => "Computerised counting of tumour infiltrating lymphocytes in 90 breast cancer specimens"
                      "autores" => array:1 [
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                          "autores" => array:6 [
                            0 => """
                              S Marsigliante \n
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                            1 => """
                              L Biscozzo \n
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                              """
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                              A Marra \n
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                              """
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                              G Nicolardi \n
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                              """
                            4 => """
                              G Leo \n
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                              """
                            5 => """
                              GB Lobreglio \n
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                              """
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                              D Pardoll \n
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                      "Revista" => array:6 [
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                      "titulo" => "Type 1 and type 2 tumor infiltrating effector cell subpopulations in progressive breast cancer"
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                            1 => """
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                              """
                            2 => """
                              RW Dutton \n
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                              """
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                              MJ Dobrzanski \n
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                              """
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                      "Revista" => array:6 [
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                        "paginaInicial" => "69"
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                      "titulo" => "Prevalence of regulatory T cells is increased in peripheral blood and tumor microenvironment of patients with pancreas or breast adenocarcinoma"
                      "autores" => array:1 [
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                            0 => """
                              UK Liyanage \n
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                              """
                            1 => """
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Article information

ISSN: 18075932
Original language: English

DOI:10.1590/S1807-59322006000300004

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