A Case Series of Monoclonal Immunoglobulin-Depositing Proliferative Glomerulonephritis.

Proliferative glomerulonephritis with monoclonal immunoglobulin deposition disease (PGNMIDD) is a rare entity. We evaluated the clinicopathological features of PGNMIDD and the effectiveness of different treatment regimens in 13 cases diagnosed using kidney biopsy. Most had chronic kidney disease followed by acute nephritic syndrome, rapidly progressive glomerulonephritis, and nephrotic syndrome. Membranoproliferative glomerulonephritis was the most common pattern of renal injury. Three patients had abnormal bone marrow studies. Different treatment regimens were deployed; >60% had partial remission at the end of six months and 30.7% progressed to end stage renal disease.