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Infraestimación de carcinoma infiltrante de mama en pacientes con diagnóstico inicial de carcinoma ductal in situ: el tamaño importa
Underestimation of invasive breast carcinoma in patients with initial diagnosis of ductal carcinoma in situ: Size matters
Alberto Bouzón Alejandroa,
Autor para correspondencia
dr.alberto@aecirujanos.es

Autor para correspondencia.
, Ángela Iglesias Lópezb, Benigno Acea Nebrila, María Lourdes García Jiméneza, Carlota Czestokowa Díaz Carballadac, José Ramón Varela Romerob
a Unidad de Mama, Servicio de Cirugía General, Complejo Hospitalario Universitario A Coruña, España
b Unidad de Mama, Servicio de Radiología, Complejo Hospitalario Universitario A Coruña, España
c Unidad de Mama, Servicio de Ginecología, Complejo Hospitalario Universitario A Coruña, España
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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Introducci&#243;n</span><p id="par0005" class="elsevierStylePara elsevierViewall">El carcinoma ductal <span class="elsevierStyleItalic">in situ</span> &#40;CDIS&#41; se considera una lesi&#243;n precursora no obligatoria del c&#225;ncer de mama infiltrante&#46; La proporci&#243;n de diagn&#243;sticos de CDIS ha aumentado desde la implementaci&#243;n del programa de cribado mamario&#44; lo que representa aproximadamente el 20&#37; de todos los nuevos carcinomas de mama en mujeres<a class="elsevierStyleCrossRef" href="#bib0005"><span class="elsevierStyleSup">1</span></a>&#46; Hasta el 90&#37; de los casos presentan microcalcificaciones sospechosas en la mamograf&#237;a<a class="elsevierStyleCrossRef" href="#bib0010"><span class="elsevierStyleSup">2</span></a>&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">El tratamiento local del CDIS incluye la cirug&#237;a conservadora de mama&#44; generalmente seguida de radioterapia&#44; y la mastectom&#237;a&#44; en funci&#243;n de la relaci&#243;n entre el tama&#241;o tumoral y mamario&#44; y de las preferencias de la paciente&#46; La mayor&#237;a de las lesiones de CDIS detectadas durante el cribado podr&#237;an tratarse mediante cirug&#237;a conservadora&#46; En las pacientes con CDIS tratadas mediante cirug&#237;a conservadora&#44; la radioterapia reduce el riesgo de reca&#237;da mamaria ipsilateral en un 15&#44;2&#37;<a class="elsevierStyleCrossRef" href="#bib0015"><span class="elsevierStyleSup">3</span></a>&#46;</p><p id="par0015" class="elsevierStylePara elsevierViewall">La biopsia selectiva de ganglio centinela &#40;BSGC&#41; es la t&#233;cnica de elecci&#243;n para la estadificaci&#243;n axilar en pacientes con carcinoma infiltrante de mama en estadio precoz&#44; aunque no se recomienda de forma rutinaria en las pacientes con diagn&#243;stico preoperatorio de CDIS tratadas mediante cirug&#237;a conservadora&#46; Sin embargo&#44; se ha sugerido realizar una BSGC de forma concomitante en las pacientes con CDIS y alto riesgo de reestadificaci&#243;n a carcinoma infiltrante<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">4</span></a>&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">El objetivo del estudio consisti&#243; en investigar la incidencia de reestadificaci&#243;n a carcinoma infiltrante de mama en nuestra serie de pacientes diagnosticadas de CDIS mediante biopsia radioguiada&#44; adem&#225;s de identificar aquellos casos con mayor probabilidad de infraestimar la presencia de un carcinoma infiltrante y&#44; por tanto&#44; en los que se deber&#237;a considerar la realizaci&#243;n de una BSGC&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">M&#233;todos</span><p id="par0025" class="elsevierStylePara elsevierViewall">Se trataron 105 pacientes con diagn&#243;stico inicial de CDIS de mama desde enero de 2014 hasta octubre de 2019&#46; Se excluyeron las pacientes con CDIS asociado a enfermedad de Paget&#44; CDIS con microinvasi&#243;n&#44; antecedentes de c&#225;ncer de mama previo&#44; biopsia quir&#250;rgica de mama previa o contraindicaci&#243;n para radioterapia&#46; Este estudio retrospectivo fue aprobado por el Comit&#233; de &#201;tica de la Investigaci&#243;n de nuestra &#193;rea Sanitaria &#40;No 2019&#47;446&#41;&#46;</p><p id="par0030" class="elsevierStylePara elsevierViewall">Las pacientes fueron diagnosticadas mediante biopsia con aguja gruesa &#40;aguja de calibre 11&#41; en caso de masa&#44; n&#243;dulo o distorsi&#243;n arquitectural&#44; o mediante biopsia asistida por vac&#237;o &#40;aguja de calibre 10&#41; en caso de presencia de calcificaciones&#46; En las muestras obtenidas mediante biopsia asistida por vac&#237;o se realiz&#243; un examen radiol&#243;gico para confirmar la presencia de calcificaciones&#46; En las lesiones de peque&#241;o tama&#241;o se coloc&#243; un clip marcador despu&#233;s de realizar la biopsia&#46;</p><p id="par0035" class="elsevierStylePara elsevierViewall">Las muestras de biopsia se fijaron en formalina tamponada al 10&#37;&#44; se incluyeron en parafina y se ti&#241;eron con hematoxilina-eosina est&#225;ndar para su estudio histol&#243;gico&#46; En la mayor&#237;a de los casos se describi&#243; el grado nuclear&#44; el patr&#243;n arquitectural&#44; la presencia de necrosis y el estado del receptor de estr&#243;geno &#40;RE&#41;&#46;</p><p id="par0040" class="elsevierStylePara elsevierViewall">Todas las pacientes fueron tratadas mediante cirug&#237;a mamaria&#46; Se realizaron cortes de 5 mm en las muestras quir&#250;rgicas y se procesaron de forma rutinaria&#46; La presencia de carcinoma infiltrante y la extensi&#243;n de la enfermedad se reflejaron en el informe histopatol&#243;gico definitivo&#46; La microinvasi&#243;n se defini&#243; como un foco tumoral &#8804; 1 mm&#46; Un margen de 2 mm se acept&#243; como negativo para las pacientes con CDIS&#46;</p><p id="par0045" class="elsevierStylePara elsevierViewall">El ganglio centinela &#40;GC&#41; se identific&#243; utilizando sulfuro coloidal marcado con tecnecio 99m o colorante azul de isosulf&#225;n&#46; Se realizaron secciones de los GC a intervalos de 2 mm y se enviaron para su procesamiento rutinario&#46;</p><p id="par0050" class="elsevierStylePara elsevierViewall">La afectaci&#243;n de los ganglios linf&#225;ticos se categoriz&#243; como macromet&#225;stasis &#40;&#62; 2 mm&#41;&#44; micromet&#225;stasis &#40;&#62; 0&#44;2 y &#8804; 2 mm&#41; o c&#233;lulas tumorales aisladas &#40;&#8804; 0&#44;2 mm&#41;&#46;</p><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">An&#225;lisis estad&#237;stico</span><p id="par0055" class="elsevierStylePara elsevierViewall">Se calcul&#243; la incidencia de reestadificaci&#243;n a carcinoma infiltrante&#46; Se realiz&#243; un an&#225;lisis univariante para examinar la asociaci&#243;n entre las caracter&#237;sticas iniciales del tumor y la presencia de carcinoma infiltrante en el estudio histopatol&#243;gico definitivo&#44; mediante el test de <span class="elsevierStyleItalic">X</span><span class="elsevierStyleSup"><span class="elsevierStyleItalic">2</span></span> o el test exacto de Fisher para variables categ&#243;ricas&#46; Un valor de p &#60; 0&#44;05 se consider&#243; estad&#237;sticamente significativo&#46; Todos los an&#225;lisis estad&#237;sticos se realizaron con el software SPSS &#40;versi&#243;n 23&#41;&#46;</p></span></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Resultados</span><p id="par0060" class="elsevierStylePara elsevierViewall">La mayor&#237;a de las lesiones de CDIS se detectaron durante el cribado &#40;74&#44;3&#37;&#41;&#46; Las caracter&#237;sticas cl&#237;nico-patol&#243;gicas de las pacientes se resumen en la <a class="elsevierStyleCrossRef" href="#tbl0005">tabla 1</a>&#46; La edad media de las pacientes fue de 58&#44;6 a&#241;os y el promedio del tama&#241;o tumoral preoperatorio fue de 2&#44;8 cm&#46; Las microcalcificaciones fueron la presentaci&#243;n inicial de la lesi&#243;n en la mamograf&#237;a en 90 pacientes &#40;85&#44;7&#37;&#41;&#46; El diagn&#243;stico preoperatorio de CDIS se realiz&#243; mediante biopsia asistida por vac&#237;o en 80 pacientes &#40;76&#44;2&#37;&#41;&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><p id="par0065" class="elsevierStylePara elsevierViewall">De forma global&#44; la tasa de reestadificaci&#243;n a carcinoma infiltrante fue del 16&#44;2&#37; &#40;17&#47;105&#41;&#46; La mayor&#237;a de estas pacientes progresaron a un estadio T1 &#40;94&#44;1&#37;&#41;&#46; El tama&#241;o medio del carcinoma infiltrante fue de 0&#44;7 cm &#40;rango 0&#44;1-3&#44;6 cm&#41;&#46; En nueve pacientes &#40;8&#44;6&#37;&#41; no se detect&#243; CDIS o carcinoma infiltrante residual en la pieza quir&#250;rgica&#46;</p><p id="par0070" class="elsevierStylePara elsevierViewall">El an&#225;lisis univariante de los factores cl&#237;nico-patol&#243;gicos predictivos de la infraestimaci&#243;n de carcinoma infiltrante en las pacientes con CDIS se resumen en la <a class="elsevierStyleCrossRef" href="#tbl0010">tabla 2</a>&#46; Entre todas las caracter&#237;sticas tumorales examinadas&#44; el &#250;nico factor asociado a la reestadificaci&#243;n a carcinoma infiltrante fue el tama&#241;o inicial del tumor&#46; Se observ&#243; una diferencia estad&#237;sticamente significativa en la tasa de infraestimaci&#243;n de carcinoma infiltrante entre las pacientes con una extensi&#243;n inicial de la lesi&#243;n &#62; 2 cm o &#8804;2 cm &#40;26&#44;8&#37; vs&#46; 4&#44;1&#37;&#59; p &#60; 0&#44;003&#41;&#46; El tipo de biopsia&#44; la presencia de microcalcificaciones&#44; el grado nuclear&#44; la presencia de comedonecrosis y el estado de los RE no se asociaron con la reestadificaci&#243;n a enfermedad invasiva&#46;</p><elsevierMultimedia ident="tbl0010"></elsevierMultimedia><p id="par0075" class="elsevierStylePara elsevierViewall">Ochenta y tres pacientes se trataron mediante cirug&#237;a conservadora &#40;79&#37;&#41; y 22 mediante mastectom&#237;a &#40;21&#37;&#41;&#46; Catorce pacientes necesitaron una cirug&#237;a adicional debido a la afectaci&#243;n de m&#225;rgenes tras cirug&#237;a conservadora &#40;en el 92&#44;9&#37; fue suficiente con una ampliaci&#243;n de m&#225;rgenes&#41;&#46; Todas las pacientes&#44; excepto una &#40;un CDIS peque&#241;o de bajo grado&#41;&#44; recibieron radioterapia adyuvante tras la cirug&#237;a conservadora&#46;</p><p id="par0080" class="elsevierStylePara elsevierViewall">En 88 de las 105 pacientes del estudio &#40;83&#44;8&#37;&#41; se realiz&#243; una BSGC de forma concomitante&#46; La media de GC extirpados fue de 2&#46; Entre las pacientes tratadas mediante cirug&#237;a conservadora&#44; se realiz&#243; la estadificaci&#243;n axilar mediante BSGC en el 79&#44;5&#37; de los casos&#46; Del total de casos&#44; solo una paciente &#40;1&#44;1&#37;&#41; present&#243; una BSGC positiva &#40;un ganglio linf&#225;tico afectado con micromet&#225;stasis&#41;&#46; Se realiz&#243; una estadificaci&#243;n axilar en un segundo tiempo quir&#250;rgico en una paciente que present&#243; una reestadificaci&#243;n a carcinoma infiltrante&#44; en la que no se hab&#237;a realizado BSGC concomitante&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Discusi&#243;n</span><p id="par0085" class="elsevierStylePara elsevierViewall">La Sociedad Americana de Oncolog&#237;a Cl&#237;nica &#40;ASCO&#41; recomienda realizar una BSGC de forma rutinaria en pacientes con CDIS tratadas mediante mastectom&#237;a&#44; pero no en las pacientes tratadas con cirug&#237;a conservadora<a class="elsevierStyleCrossRefs" href="#bib0025"><span class="elsevierStyleSup">5&#44;6</span></a>&#46; Sin embargo&#44; aproximadamente el 25&#37; de las pacientes diagnosticadas inicialmente con CDIS progresar&#225;n a carcinoma infiltrante en el estudio histopatol&#243;gico definitivo<a class="elsevierStyleCrossRef" href="#bib0035"><span class="elsevierStyleSup">7</span></a>&#46; En el contexto de una cirug&#237;a conservadora y tras una cuidadosa discusi&#243;n interdisciplinar&#44; se debe considerar la BSGC en pacientes con CDIS y alto riesgo de reestadificaci&#243;n&#44; con el objetivo de evitar una reintervenci&#243;n para la evaluaci&#243;n axilar&#46;</p><p id="par0090" class="elsevierStylePara elsevierViewall">Hemos observado una tasa de reestadificaci&#243;n a carcinoma infiltrante del 16&#44;2&#37;&#44; similar a la de otros estudios<a class="elsevierStyleCrossRefs" href="#bib0040"><span class="elsevierStyleSup">8&#8211;10</span></a>&#46; Gumus et al&#46;<a class="elsevierStyleCrossRef" href="#bib0050"><span class="elsevierStyleSup">10</span></a> observaron una tasa de infraestimaci&#243;n del 17&#44;8&#37;&#44; sin embargo&#44; solo incluyeron en su estudio lesiones con microcalcificaciones diagnosticadas mediante biopsia asistida por vac&#237;o&#46;</p><p id="par0095" class="elsevierStylePara elsevierViewall">Se identific&#243; el tama&#241;o inicial del tumor como un factor predictivo para la reestadificaci&#243;n a carcinoma infiltrante&#46; Estos resultados son compatibles con el estudio de Kurniawan et al&#46;<a class="elsevierStyleCrossRef" href="#bib0055"><span class="elsevierStyleSup">11</span></a>&#44; que observaron una tasa de infraestimaci&#243;n del 12&#44;5&#37; en lesiones &#8804; 2 cm frente al 26&#44;7&#37; detectado en lesiones &#62; 2 cm &#40;p &#61; 0&#44;001&#41;&#46; En el estudio de Marques et al&#46;<a class="elsevierStyleCrossRef" href="#bib0060"><span class="elsevierStyleSup">12</span></a>&#44; el tama&#241;o del tumor no se asoci&#243; con la infraestimaci&#243;n&#44; lo que se explicaba por la alta tasa de casos con CDIS diagnosticados durante el cribado&#46;</p><p id="par0100" class="elsevierStylePara elsevierViewall">En nuestra serie&#44; la tasa de infraestimaci&#243;n fue mayor tras una biopsia con aguja gruesa&#44; en las lesiones sin calcificaciones&#44; en el CDIS de alto grado y en presencia de comedonecrosis&#44; aunque estas diferencias no alcanzaron una significaci&#243;n estad&#237;stica debido al peque&#241;o tama&#241;o muestral&#46; Sin embargo&#44; varios estudios han demostrado que estos factores predicen una infraestimaci&#243;n de carcinoma infiltrante en el estudio histopatol&#243;gico definitivo&#46; Se ha demostrado que el CDIS diagnosticado mediante biopsia con aguja gruesa tiene un mayor riesgo de infraestimaci&#243;n frente a la biopsia asistida por vac&#237;o&#44; debido a la menor cantidad de tejido extirpado<a class="elsevierStyleCrossRefs" href="#bib0060"><span class="elsevierStyleSup">12&#8211;14</span></a>&#46; Schulz et al&#46;<a class="elsevierStyleCrossRef" href="#bib0040"><span class="elsevierStyleSup">8</span></a> y Kurniawan et al&#46;<a class="elsevierStyleCrossRef" href="#bib0055"><span class="elsevierStyleSup">11</span></a> se&#241;alaron que las lesiones sospechosas sin calcificaciones en la mamograf&#237;a se asociaron significativamente con la reestadificaci&#243;n a carcinoma infiltrante&#46; Lee et al&#46;<a class="elsevierStyleCrossRef" href="#bib0075"><span class="elsevierStyleSup">15</span></a> observaron que el grado nuclear era un factor de riesgo significativo para la reestadificaci&#243;n&#46; Son et al&#46;<a class="elsevierStyleCrossRef" href="#bib0080"><span class="elsevierStyleSup">16</span></a> y Marques et al&#46;<a class="elsevierStyleCrossRef" href="#bib0060"><span class="elsevierStyleSup">12</span></a> observaron que la presencia de comedonecrosis era un factor predictivo independiente de infraestimaci&#243;n de carcinoma infiltrante&#46;</p><p id="par0105" class="elsevierStylePara elsevierViewall">El porcentaje de met&#225;stasis en los ganglios linf&#225;ticos en pacientes con CDIS puro es bajo&#44; generalmente menor al 2&#37;<a class="elsevierStyleCrossRefs" href="#bib0045"><span class="elsevierStyleSup">9&#44;16&#8211;19</span></a>&#46; En este estudio&#44; casi el 99&#37; de las BSGC fueron negativas&#46; Solo una paciente tratada con cirug&#237;a conservadora present&#243; una micromet&#225;stasis en los ganglios linf&#225;ticos&#44; sin evidencia de tumor residual en la muestra quir&#250;rgica mamaria&#46; La paciente no recibi&#243; cirug&#237;a axilar adicional&#46; En este caso&#44; se sospech&#243; la presencia de un peque&#241;o foco de invasi&#243;n no detectado tras la biopsia asistida por vac&#237;o&#46;</p><p id="par0110" class="elsevierStylePara elsevierViewall">Nuestros datos apoyan la recomendaci&#243;n actual de omitir la cirug&#237;a axilar en pacientes con diagn&#243;stico preoperatorio de CDIS&#46; La BSGC es un procedimiento m&#237;nimamente invasivo en comparaci&#243;n con el vaciamiento ganglionar axilar convencional&#46; Sin embargo&#44; una BSGC innecesaria implica un aumento en la morbilidad&#44; los costes econ&#243;micos y el tiempo quir&#250;rgico&#46; Un estudio prospectivo realizado por Goldberg et al&#46;<a class="elsevierStyleCrossRef" href="#bib0100"><span class="elsevierStyleSup">20</span></a> en pacientes con c&#225;ncer de mama y axila cl&#237;nicamente negativa&#44; describi&#243; una incidencia de linfedema del 5&#37; con un seguimiento medio de cinco a&#241;os&#46; Otras complicaciones como seromas&#44; dolor&#44; parestesias y reducci&#243;n del rango de movimiento pueden disminuir la calidad de vida en estas pacientes&#46;</p><p id="par0115" class="elsevierStylePara elsevierViewall">Seg&#250;n Lara et al&#46;<a class="elsevierStyleCrossRef" href="#bib0105"><span class="elsevierStyleSup">21</span></a>&#44; las micromet&#225;stasis en los ganglios linf&#225;ticos no tienen un significado cl&#237;nico aparente en las pacientes con CDIS&#46; Recientemente&#44; se ha sugerido no realizar una BSGC de forma concomitante en aquellas pacientes con CDIS y sospecha de microinvasi&#243;n<a class="elsevierStyleCrossRef" href="#bib0110"><span class="elsevierStyleSup">22</span></a>&#46; Adem&#225;s&#44; Magnoni et al&#46;<a class="elsevierStyleCrossRef" href="#bib0115"><span class="elsevierStyleSup">23</span></a> encontraron una buena supervivencia libre de enfermedad y supervivencia global en mujeres con BSGC positiva y CDIS con microinvasi&#243;n&#44; lo que sugiere que la BSGC no ser&#237;a &#250;til en estas pacientes&#46;</p><p id="par0120" class="elsevierStylePara elsevierViewall">En nuestro estudio&#44; el 94&#44;1&#37; de las pacientes con reestadificaci&#243;n presentaban carcinoma infiltrante en estadio T1&#44; en el que la imagen radiol&#243;gica podr&#237;a reemplazar la estadificaci&#243;n axilar quir&#250;rgica en los pr&#243;ximos a&#241;os&#46; Actualmente&#44; hay tres ensayos cl&#237;nicos prospectivos en curso dise&#241;ados para evaluar la seguridad de omitir la BSGC en pacientes con c&#225;ncer de mama precoz y axila cl&#237;nicamente negativa tratadas mediante cirug&#237;a conservadora<a class="elsevierStyleCrossRefs" href="#bib0120"><span class="elsevierStyleSup">24&#8211;26</span></a>&#46; El estudio SOUND &#40;<span class="elsevierStyleItalic">Sentinel node</span> vs&#46; <span class="elsevierStyleItalic">Observation after axillary Ultra-SouND</span>&#41;<a class="elsevierStyleCrossRef" href="#bib0120"><span class="elsevierStyleSup">24</span></a> incluye pacientes con enfermedad T1&#44; mientras que los estudios BOOG 2013-0825 e <span class="elsevierStyleItalic">Intergroup-Sentinel-Mamma</span> &#40;INSEMA&#41;<a class="elsevierStyleCrossRef" href="#bib0130"><span class="elsevierStyleSup">26</span></a> incluyen pacientes con enfermedad T1-T2&#46; Mientras no se disponga de los resultados de estos estudios&#44; la BSGC sigue siendo la t&#233;cnica de referencia para la estadificaci&#243;n ganglionar en pacientes con c&#225;ncer de mama precoz y axila cl&#237;nicamente negativa y&#44; por tanto&#44; este procedimiento puede contemplarse en pacientes seleccionadas con CDIS y alto riesgo de reestadificaci&#243;n a carcinoma infiltrante&#46;</p><p id="par0125" class="elsevierStylePara elsevierViewall">Las principales limitaciones de este an&#225;lisis son el dise&#241;o retrospectivo de este estudio unic&#233;ntrico y el n&#250;mero limitado de pacientes&#46;</p><p id="par0130" class="elsevierStylePara elsevierViewall">En conclusi&#243;n&#44; la tasa de reestadificaci&#243;n en nuestra serie fue del 16&#44;2&#37;&#46; En pacientes con CDIS tratadas mediante cirug&#237;a conservadora&#44; se puede considerar realizar una BSGC de forma concomitante si la lesi&#243;n mamaria mide m&#225;s de 2 cm&#44; ya que una de cada cuatro albergar&#225; un carcinoma infiltrante&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Conflicto de intereses</span><p id="par0135" class="elsevierStylePara elsevierViewall">Los autores declaran no tener ning&#250;n conflicto de intereses&#46;</p></span></span>"
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          "palabras" => array:4 [
            0 => "Carcinoma ductal <span class="elsevierStyleItalic">in situ</span>"
            1 => "Carcinoma infiltrante de mama"
            2 => "Biopsia selectiva de ganglio centinela"
            3 => "Cirug&#237;a conservadora de mama"
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            0 => "Ductal carcinoma <span class="elsevierStyleItalic">in situ</span>"
            1 => "Invasive breast carcinoma"
            2 => "Sentinel lymph node biopsy"
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    "resumen" => array:2 [
      "es" => array:3 [
        "titulo" => "Resumen"
        "resumen" => "<span id="abst0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Introducci&#243;n</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">El objetivo de nuestro estudio consisti&#243; en identificar aquellas pacientes con diagn&#243;stico preoperatorio de carcinoma ductal <span class="elsevierStyleItalic">in situ</span> &#40;CDIS&#41; y alto riesgo de presentar un carcinoma infiltrante en la lesi&#243;n&#44; en las que se deber&#237;a considerar realizar una biopsia selectiva de ganglio centinela &#40;BSGC&#41;&#46;</p></span> <span id="abst0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">M&#233;todos</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Se estudiaron 105 pacientes con CDIS tratadas mediante cirug&#237;a conservadora o mastectom&#237;a&#46; Se analizaron las caracter&#237;sticas preoperatorias de los tumores para investigar su asociaci&#243;n con la infraestimaci&#243;n de carcinoma infiltrante&#46;</p></span> <span id="abst0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Resultados</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">El porcentaje global de infraestimaci&#243;n de carcinoma infiltrante fue del 16&#44;2&#37;&#46; El porcentaje de infraestimaci&#243;n fue mayor en las lesiones con un tama&#241;o inicial superior a 2 cm en comparaci&#243;n con las lesiones con un tama&#241;o igual o menor a 2 cm &#40;26&#44;8&#37; vs&#46; 4&#44;1&#37;&#44; respectivamente&#59; p &#60; 0&#44;003&#41;&#46; Se realiz&#243; la BSGC en 88 pacientes &#40;83&#44;8&#37;&#41;&#44; encontr&#225;ndose afectaci&#243;n ganglionar en un solo caso &#40;1&#44;1&#37;&#41;&#46;</p></span> <span id="abst0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Conclusiones</span><p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">En pacientes con diagn&#243;stico inicial de CDIS tratadas mediante cirug&#237;a conservadora&#44; se deber&#237;a considerar realizar una BSGC cuando el tama&#241;o de la lesi&#243;n es superior a 2 cm&#44; ya que uno de cada cuatro casos albergar&#225; la presencia de un carcinoma infiltrante&#46;</p></span>"
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        "resumen" => "<span id="abst0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Introduction</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">The aim of our study was to identify those patients with preoperative diagnosis of ductal carcinoma <span class="elsevierStyleItalic">in situ</span> &#40;DCIS&#41; and high risk of upstaging to invasive breast carcinoma &#40;IBC&#41;&#44; in whom sentinel lymph node biopsy &#40;SLNB&#41; should be considered&#46;</p></span> <span id="abst0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Methods</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">One-hundred and five DCIS patients treated with breast-conserving surgery &#40;BCS&#41; or mastectomy were studied&#46; Preoperative features of the tumors were analyzed to investigate its association with underestimation of IBC on final pathology&#46;</p></span> <span id="abst0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Results</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">Overall&#44; the underestimation rate of IBC was 16&#46;2&#37;&#46; The underestimation rate was highest in lesions with initial size &#62;2 cm compared with those with size &#8804;2 cm &#40;26&#46;8&#37; vs&#46; 4&#46;1&#37;&#44; respectively&#59; <span class="elsevierStyleItalic">p</span> &#60; 0&#46;003&#41;&#46; Eighty-eight patients &#40;83&#46;8&#37;&#41; underwent concurrent SLNB and only one case had lymph node involvement &#40;1&#46;1&#37;&#41;&#46;</p></span> <span id="abst0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0055">Conclusions</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">SLNB should be considered in DCIS patients receiving BCS with lesions greater than 2 cm since approximately one in four will harbor an IBC&#46;</p></span>"
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        "mostrarFloat" => true
        "mostrarDisplay" => false
        "detalles" => array:1 [
          0 => array:3 [
            "identificador" => "at1"
            "detalle" => "Tabla "
            "rol" => "short"
          ]
        ]
        "tabla" => array:2 [
          "leyenda" => "<p id="spar0055" class="elsevierStyleSimplePara elsevierViewall">DS&#58; desviaci&#243;n est&#225;ndar&#59; IC&#58; intervalo de confianza&#59; BAG&#58; biopsia con aguja gruesa&#59; BAV&#58; biopsia asistida por vac&#237;o&#59; RE&#58; receptor de estr&#243;geno</p>"
          "tablatextoimagen" => array:2 [
            0 => array:2 [
              "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" style="border-bottom: 2px solid black">Variables&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" style="border-bottom: 2px solid black">Media&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" style="border-bottom: 2px solid black">DS&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" style="border-bottom: 2px solid black">Mediana&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" style="border-bottom: 2px solid black">Rango&nbsp;\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-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Edad &#40;a&#241;os&#41;&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">58&#44;6&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">9&#44;2&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">59&#44;0&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">39&#44;0-82&#44;0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Tama&#241;o tumoral &#40;cm&#41;&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">2&#44;8&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">2&#44;1&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">2&#44;3&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#44;4-10&#44;0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
              "imagenFichero" => array:1 [
                0 => "xTab2736666.png"
              ]
            ]
            1 => array:2 [
              "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="" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">&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="" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">&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" style="border-bottom: 2px solid black">n&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" style="border-bottom: 2px solid black">&#37;&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" style="border-bottom: 2px solid black">IC 95&#37;&nbsp;\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  " rowspan="2" align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Tipo de biopsia</td><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">BAG&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">25&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">23&#44;8&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">16&#44;5-33&#44;0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">BAV&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">80&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">76&#44;2&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">66&#44;9-83&#44;5&nbsp;\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  " rowspan="2" align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Microcalcificaciones</td><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">No&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">15&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">14&#44;3&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">8&#44;7-22&#44;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">S&#237;&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">90&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">85&#44;7&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">77&#44;5-91&#44;3&nbsp;\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  " rowspan="2" align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Grado histol&#243;gico</td><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">Bajo-Medio&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">37&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">35&#44;2&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">26&#44;6-44&#44;9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Alto&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">68&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">64&#44;8&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">55&#44;0-73&#44;4&nbsp;\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  " rowspan="3" align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Comedonecrosis</td><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">No&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">38&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">36&#44;2&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">27&#44;4-45&#44;9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">S&#237;&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">63&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">60&#44;0&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">52&#44;2-69&#44;0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Desconocido&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">3&#44;8&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&#44;4-9&#44;9&nbsp;\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  " rowspan="3" align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Estado del RE</td><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">Positivo&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">66&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">62&#44;9&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">53&#44;1-71&#44;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Negativo&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="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">18&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="left" valign="\n
                  \t\t\t\t\ttop\n
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ISSN: 0009739X
Idioma original: Español
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