title: Case 31-1983: Richter's syndrome.
mesh_terms: D000368:Aged; D001402:B-Lymphocytes / Q000276:immunology; D006801:Humans; D007136:Immunoglobulins / Q000032:analysis; D007945:Leukemia, Lymphoid / Q000276:immunology / Q000473:pathology*; D008223:Lymphoma / Q000276:immunology / Q000473:pathology*; D008297:Male
chemical_list: D007136:Immunoglobulins