Primary cutaneous plasmacytoma.
D000368:Aged; D002081:Buttocks; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D009101:Multiple Myeloma / Q000175:diagnosis; D010954:Plasmacytoma / Q000473:pathology / Q000601:surgery; D012878:Skin Neoplasms / Q000473:pathology / Q000601:surgery