IgG4-related disease and idiopathic membranous nephropathy: 
"The clothes do not make the man"
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IgG4-related disease and idiopathic membranous nephropathy: 
"The clothes do not make the man"
.
Clin Nephrol. 2016 Oct 14;
Authors: Acevedo Ribó M, Ahijado Hormigos FJ, Díaz F, Romero Molina M, Fernandez Rojo MA, Garcia Rubiales MA, García Diaz E
Abstract
This case report describes a patient with a previous history of autoimmune pancreatitis secondary to IgG4-related disease, who developed an overt nephrotic syndrome due to membranous nephropathy, surprisingly idiopathic. In all the previously described cases with both concurrent diseases, membranous nephropathy was considered to be secondary to the IgG4-related disease based on the absence of anti-PLA2R1 autoantibodies, and nephrotic syndrome usually remitted after treatment with steroids alone. However, in our patient positivity of serum anti-PLA2R1 autoantibodies together with a normal serum IgG4 level, and the absence of the other most commonly associated diseases were compatible with an idiopathic membranous nephropathy. Combination treatment with steroids and cyclophosphamide was successful. We hypothesize about causality or coincidental diseases and the importance of a correct classification.
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PMID: 27737530 [PubMed - as supplied by publisher]

Source: Clinical Nephrology - October 13, 2016 Category: Urology & Nephrology Authors: Acevedo Ribó M, Ahijado Hormigos FJ, Díaz F, Romero Molina M, Fernandez Rojo MA, Garcia Rubiales MA, García Diaz E Tags: Clin Nephrol Source Type: research