原发性腹膜后肿瘤系指起源于腹膜后潜在间隙内的肿瘤,其组织学类型繁多,部位深在,缺乏特异表现,肿瘤常较大,多累及周围脏器,因而其诊治比较困难[1] 。大多数腹膜后肿瘤对放疗、化疗及其他辅助治疗不敏感,而手术是治疗腹膜后肿瘤最重要和最有效的手段。同时,腹膜后肿瘤多呈低度? Primary retroperitoneal tumor refers to the tumor originating in the retroperitoneal space within the potential gap, the histological types of deep, the site is deep, the lack of specific performance, the tumor often larger, involving more than the surrounding organs, so its diagnosis and treatment more difficult [1 ]. Most retroperitoneal tumors are not sensitive to radiotherapy, chemotherapy and other adjuvant therapies, and surgery is the most important and effective means of treating retroperitoneal tumors. At the same time, retroperitoneal tumors were mostly low?