病例资料患者,男,22岁。左下肢间断性肿胀两年余。左下腹外伤后左下肢肿胀,以“左下肢静脉血栓”收治,症状经治疗后好转又反复,无发热、恶心、呕吐、腹痛、腹胀。查体:左下腹触及一包块,无压痛,反跳痛,腹肌无紧张,肝脾不大。CT平扫示左盆腔腹膜后间隙内见一囊实质性肿块,约10cm Case information patients, male, 22 years old. Left leg intermittent swelling more than two years. Left lower extremity swelling after left lower quadrant trauma, “left venous thrombosis” admitted, the symptoms improved and repeated after treatment, no fever, nausea, vomiting, abdominal pain, abdominal distension. Physical examination: touch the left lower quadrant of a mass, no tenderness, rebound tenderness, abdominal tension, little liver and spleen. CT scan showed left pelvic peritoneal space see a capsule of a substantial mass, about 10cm