Distinguishing nondiabetic renal disease (NDKD) from diabetic nephropathy (DN) is of paramount importance in choosing treatment modalities and determining renal prognosis. Nearly 40% of the patients with diabetes are likely to have NDKD. We report a case of a patient with diabetes with a massive nephrotic range of proteinuria that was labeled as DN based on LM and IF, but paraffin IF confirmed the presence of masked MN.
Keywords: Diabetes; membranous nephropathy; nondiabetic kidney disease.
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