title: A case of Richter's syndrome due to the spontaneous proliferation of two immunologically unrelated B cell malignancies.
mesh_terms: D001402:B-Lymphocytes / Q000166:cytology / Q000276:immunology*; D002471:Cell Transformation, Neoplastic; D006801:Humans; D007147:Immunoglobulin Light Chains / Q000032:analysis; D007945:Leukemia, Lymphoid / Q000150:complications / Q000175:diagnosis* / Q000276:immunology; D008228:Lymphoma, Non-Hodgkin / Q000150:complications / Q000175:diagnosis*; D008297:Male; D008875:Middle Aged; D011947:Receptors, Antigen, B-Cell / Q000032:analysis; D013577:Syndrome
chemical_list: D007147:Immunoglobulin Light Chains; D011947:Receptors, Antigen, B-Cell