title: Case records of the Massachusetts General Hospital. Weekly clinicopathological exercises. Case 43-1985. A 70-year-old man with diarrhea, weight loss, and recurrent atrial fibrillation.
mesh_terms: D000368:Aged; D000682:Amyloid / Q000032:analysis; D000686:Amyloidosis / Q000150:complications / Q000175:diagnosis / Q000473:pathology*; D001281:Atrial Fibrillation / Q000150:complications; D001706:Biopsy; D003937:Diagnosis, Differential; D003967:Diarrhea / Q000209:etiology; D006651:Histocytochemistry; D006801:Humans; D007145:Immunoglobulin kappa-Chains / Q000032:analysis; D007146:Immunoglobulin lambda-Chains / Q000032:analysis; D007410:Intestinal Diseases / Q000473:pathology*; D007421:Intestine, Small / Q000473:pathology; D008286:Malabsorption Syndromes / Q000209:etiology; D008297:Male; D009101:Multiple Myeloma / Q000150:complications / Q000175:diagnosis / Q000473:pathology*; D010950:Plasma Cells / Q000648:ultrastructure; D013272:Stomach Diseases / Q000175:diagnosis / Q000473:pathology*
chemical_list: D000682:Amyloid; D007145:Immunoglobulin kappa-Chains; D007146:Immunoglobulin lambda-Chains