Leiomyosarcoma of the popliteal vein.
D000368:Aged; D003937:Diagnosis, Differential; D006801:Humans; D007890:Leiomyosarcoma / Q000175:diagnosis*; D008297:Male; D011152:Popliteal Vein / Q000000981:diagnostic imaging*; D011859:Radiography; D012983:Soft Tissue Neoplasms / Q000175:diagnosis*; D013924:Thrombophlebitis / Q000175:diagnosis