Concomitant Histological Features of Membranous Nephropathy and Anti-Neutrophil Cytoplasmic Antibody Associated Vasculitis.

The simultaneous occurrence of vasculitic glomerulonephritis and membranous nephropathy is unusual. We report two cases that presented to our outpatient department with rapidly progressive renal failure. On evaluation, in one patient, anti-myeloperoxidase (MPO) titers were high, and renal biopsy was suggestive of concurrent necrotizing and diffuse crescentic anti-MPO anti-neutrophil cytoplasmic antigen-associated glomerulonephritis with the circumferential cellular crescent formation and membranous glomerulopathy. He responded to plasmapheresis followed by maintenance immunosuppression with oral cyclophosphomide. Another patient was treated with Methylprednisolone and two doses of rituximab. Both the patients showed marked symptomatic improvement and became dialysis independent with stable creatinine at 3 months.