腹膜后非脏器肿瘤主要表现为腹部包块,临床90%以上均可触及腹部肿块,对诊断腹部肿瘤尚不困难,但经过超声显像检查,能明确地显示腹壁结构、腹腔和腹膜后器官,因此能提高术前对腹膜后肿瘤的诊断率(1～4)。我科从1988年4月～1998年9月对45例腹膜后非脏器肿瘤患者进行了超声检查,现 The retroperitoneal non-visceral tumor mainly presents as an abdominal mass, and more than 90% of the clinical mass can reach the abdominal mass. It is not difficult to diagnose abdominal tumors. However, ultrasound imaging can clearly show the abdominal wall structure, abdominal cavity and retroperitoneal organs. Therefore, it can improve the preoperative diagnosis of retroperitoneal tumors (1 to 4). In our department from April 1988 to September 1998, 45 patients with retroperitoneal non-organ cancer were examined by ultrasound.