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We report a clinical case of MN secondary to syphilis which, although a rare infection, has seen an increase in its incidence and complications during the last decade.<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">1</span></a></p><p id="par0010" class="elsevierStylePara elsevierViewall">The case involved a 23-year-old Caucasian male, tobacco, and cannabis smoker, with bronchial hyperresponsiveness and recurrent pharyngotonsillitis in childhood.</p><p id="par0015" class="elsevierStylePara elsevierViewall">The patient went to the emergency department for a 10-day history of arthralgias without arthritis and oedema. Two months earlier, he had presented with a dry cough, odynophagia, dysthermia without thermometer fever and generalized erythematous macular lesions that did not disappear under diascopy, including the palms and soles, but not affecting the mucous membranes, self-limiting within 15 days. He denied macroscopic hematuria; he also reported taking non-steroidal anti-inflammatory drugs and paracetamol. He denied alcohol consumption and reported unsafe sex 2 months earlier.</p><p id="par0020" class="elsevierStylePara elsevierViewall">Physical examination revealed pharyngo-tonsillar erythema, occipital lymphadenopathy, and generalized oedema. There were no lesions on the skin or mucous membranes and no signs of arthritis. The rest of the examination was normal.</p><p id="par0025" class="elsevierStylePara elsevierViewall">The CBC showed a proteinuria of 8<span class="elsevierStyleHsp" style=""></span>g/d with hypoalbuminemia (18<span class="elsevierStyleHsp" style=""></span>g/l), hypercholesterolaemia (7.17<span class="elsevierStyleHsp" style=""></span>mmol/l), decreased antithrombin-III (67<span class="elsevierStyleHsp" style=""></span>int.<span class="elsevierStyleHsp" style=""></span>u./dl), creatinine of 73<span class="elsevierStyleHsp" style=""></span>μmol/l, C-reactive protein 15.5<span class="elsevierStyleHsp" style=""></span>mg/l and a pattern of dissociated cholestasis and mild cytolysis. Urinary sediment with mild intermittent hematuria. The immunological study showed polyclonal hypergammaglobulinemia with positive cryoglobulins not characterized by low cryocrit, with negative rheumatoid factor. Complement, antinuclear antibody, anti-neutrophil cytoplasmic antibody and antiPLA2R were negative. Negative serology for hepatitis B, C and human immunodeficiency virus, positive Epstein–Barr virus (both IgM and IgG) and positive syphilis serologies (reagin and non-reagin tests).</p><p id="par0030" class="elsevierStylePara elsevierViewall">A renal biopsy showed 31 glomeruli without significant histological findings, with hematoxylin–eosin, PAS and methenamine silver staining. Immunofluorescence showed IgG+++, C1q++, C3+/−, Kappa and Lambda+++ deposits with diffuse and generalized intramembranous granular parietal pattern. PLA2R staining was negative.</p><p id="par0035" class="elsevierStylePara elsevierViewall">It was diagnosed as MN secondary to syphilis, initiating treatment with a single dose of intramuscular benzathine penicillin (2,4 MIU), together with treatment for NS (prophylactic, lipid-lowering and diuretic heparin) and antiproteinuric therapy with angiotensin-converting enzyme inhibitor. One month after treatment the patient achieved complete remission of NS.</p><p id="par0040" class="elsevierStylePara elsevierViewall">The rare association between NS and secondary syphilis has been known for more than 100 years.<a class="elsevierStyleCrossRef" href="#bib0035"><span class="elsevierStyleSup">2</span></a> In 1935 Herrmann and Marr reported an incidence of NS of 0.28% in a series of 1040 patients with syphilis.<a class="elsevierStyleCrossRef" href="#bib0040"><span class="elsevierStyleSup">3</span></a> Subsequently, thanks to antibiotic treatment and the use of condoms, the incidence of infection and the number of association cases decreased, with a current spike in reported cases.</p><p id="par0045" class="elsevierStylePara elsevierViewall">Although other types of nephropathies associated with syphilis (minimal change, postinfectious, …) have been reported, the most common is MN. The subepithelial deposition of syphilis antigen–antibody complexes has been postulated as the pathophysiological mechanism of kidney involvement.<a class="elsevierStyleCrossRef" href="#bib0045"><span class="elsevierStyleSup">4</span></a> Histologically, it may develop with optically normal glomeruli, as in this case, raising the differential diagnosis with minimal change nephropathy. The most decisive findings are provided by immunofluorescence, showing abundant subepithelial deposits with a prevalence of IgG, usually along with positive C1q.</p><p id="par0050" class="elsevierStylePara elsevierViewall">Syphilis is a sexually transmitted disease caused by the <span class="elsevierStyleItalic">Treponema pallidum</span> spirochete. The most common lesion in secondary syphilis is a 1–2<span class="elsevierStyleHsp" style=""></span>cm macular erythema, painless, affecting the palms, soles, and even mucous membranes. In addition, it can be accompanied by lymphadenopathy, hepatosplenomegaly, hepatitis, gastrointestinal symptoms, and renal involvement with NS, as in the case at hand, among others.<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">1</span></a></p><p id="par0055" class="elsevierStylePara elsevierViewall">Treatment of syphilis-associated MN is based on specific treatment of the infection with intramuscular benzathine penicillin, resulting in rapid clinical and laboratory improvements and a high percentage of complete nephropathy remission.<a class="elsevierStyleCrossRef" href="#bib0050"><span class="elsevierStyleSup">5</span></a></p><p id="par0060" class="elsevierStylePara elsevierViewall">Therefore, the possibility of underlying syphilis must be considered in the study of MN, making it a diagnostic challenge in the face of the increasing prevalence of syphilis disease and its secondary symptoms.</p><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0005">Funding</span><p id="par0065" class="elsevierStylePara elsevierViewall">No funding has been received for the preparation of this paper.</p></span></span>" "textoCompletoSecciones" => array:1 [ "secciones" => array:2 [ 0 => array:2 [ "identificador" => "sec0005" "titulo" => "Funding" ] 1 => array:1 [ "titulo" => "References" ] ] ] "pdfFichero" => "main.pdf" "tienePdf" => true "NotaPie" => array:1 [ 0 => array:2 [ "etiqueta" => "☆" "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Please cite this article as: Anton Pampols P, Espejo-Herrera N, Coloma A. Nefropatía membranosa asociada a sífilis secundaria. Med Clin (Barc). 2021;157:596–597.</p>" ] ] "bibliografia" => array:2 [ "titulo" => "References" "seccion" => array:1 [ 0 => array:2 [ "identificador" => "bibs0015" "bibliografiaReferencia" => array:5 [ 0 => array:3 [ "identificador" => "bib0030" "etiqueta" => "1" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Syphilis" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:1 [ 0 => "E.W. Hook" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.1016/S0140-6736(16)32411-4" "Revista" => array:6 [ "tituloSerie" => "Lancet" "fecha" => "2017" "volumen" => "389" "paginaInicial" => "1550" "paginaFinal" => "1557" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/27993382" "web" => "Medline" ] ] ] ] ] ] ] ] 1 => array:3 [ "identificador" => "bib0035" "etiqueta" => "2" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Acute syphilitic nephrosis" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:2 [ 0 => "D. Robins" 1 => "A. Ladd" ] ] ] ] ] "host" => array:1 [ 0 => array:1 [ "Revista" => array:5 [ "tituloSerie" => "AM J Med" "fecha" => "1962" "volumen" => "1962" "paginaInicial" => "817" "paginaFinal" => "821" ] ] ] ] ] ] 2 => array:3 [ "identificador" => "bib0040" "etiqueta" => "3" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "The nephrotic syndrome associated with secondary syphilis. An immune deposit disease" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:5 [ 0 => "G. Braunstein" 1 => "E. Lewis" 2 => "E.G. Galvanek" 3 => "A. Hamilton" 4 => "W. Bell" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.1016/0002-9343(70)90016-1" "Revista" => array:6 [ "tituloSerie" => "Am J Med" "fecha" => "1970" "volumen" => "48" "paginaInicial" => "643" "paginaFinal" => "648" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/4912935" "web" => "Medline" ] ] ] ] ] ] ] ] 3 => array:3 [ "identificador" => "bib0045" "etiqueta" => "4" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Immunopathogenesis of syphilitic glomerulonephritis. Elution of antitreponemal antibody from glomerular immune-complex deposits" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:2 [ 0 => "C. Gamble" 1 => "J. Reardan" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.1056/NEJM197502272920903" "Revista" => array:6 [ "tituloSerie" => "N Engl J Med" "fecha" => "1975" "volumen" => "292" "paginaInicial" => "449" "paginaFinal" => "454" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/1089888" "web" => "Medline" ] ] ] ] ] ] ] ] 4 => array:3 [ "identificador" => "bib0050" "etiqueta" => "5" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Syphilis: a reversible cause of nephrotic syndrome" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:4 [ 0 => "M.L. Handoko" 1 => "M. Duijvestein" 2 => "C.G. 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Vol. 157. Issue 12.
Pages 596-597 (December 2021)
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Vol. 157. Issue 12.
Pages 596-597 (December 2021)
Letter to the Editor
Membranous nephropathy related to secondary syphilis
Nefropatía membranosa asociada a sífilis secundaria
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