Related Experiment Video
Updated: Oct 9, 2025

Analyses of Proteinuria, Renal Infiltration of Leukocytes, and Renal Deposition of Proteins in Lupus-prone MRL/lpr Mice
Published on: June 8, 2022
Membranous Nephropathy with Lambda Light Chain Restriction: A Rare Form with Serum Negative and Tissue Positive PLA2R
Emel Isiktas Sayilar1, Saba Kiremitci2, Ihsan Ergun1
1Department of Nephrology, Ufuk University School of Medicine, Dr. Rıdvan Ege Hospital, Ankara, Turkey.
Abstract:
Membranous nephropathy (MN) is the most common cause of nephrotic syndrome in adults. Subepithelial polyclonal immunoglobulin deposits and >70% M-type phospholipase A2 receptor antibody positivity are typical findings in idiopathic MN. A 58-year-old female patient was admitted with clinical presentation of nephrotic syndrome. Autoimmune diseases, infections, and malignancies were ruled out after clinical and laboratory evaluations. Diagnostic work-up revealed serum PLA2R antibody negativity and diffuse thickening of glomerular capillary wall on biopsy, while glomerular capillary wall IgG, C3, and Lambda monotypic light chain deposition and PLA2R1 positivity were detected by immunofluorescence and immunohistochemical examination, respectively. Following prednisolone treatment, creatinine and proteinuria were markedly regressed. The MN cases with a light chain deposits are rare and experience regarding their treatment are insufficient.
Related Concept Videos
Nephrotic Syndrome I : Introduction
Nephrotic Syndrome II : Assessment and Medical Management

