原发性腹膜后肿瘤(pri mary retroperitoneal tumor,PRT)是指原发于腹膜后潜在间隙内的肿瘤,该病发病率低,国外报道占全身肿瘤的0.07%~0.2%。由于组织学类型繁多,部位深在,缺乏特异临床表现,且肿瘤常较大并累及周围脏器,因而其诊治比较困难。我们总结了1989至2005年我院收治的2 Primary retroperitoneal tumor (PRT) refers to the primary tumor in the retroperitoneal space, the incidence of the disease is low, foreign reports of systemic tumors of 0.07% to 0.2%. Because of the many types of histology, the deep part of the site, the lack of specific clinical manifestations, and the tumor often larger and involving the surrounding organs, so its diagnosis and treatment more difficult. We summarize 2 of our hospital from 1989 to 2005