Case Presentation: A 73-year-old male with history of type 2 diabetes and one-month prior admission for acute renal failure in the setting of stage IV chronic kidney disease presented with symptomatic anemia found to have splenomegaly. A renal biopsy revealed features of membranoproliferative glomerulonephritis and necrotizing crescentic lesions with IgM kappa deposition, suspicious for cryoglobulinemic glomerulonephritis. Immunofixation […]