目的    探讨外科治疗原发性腹膜后肿瘤的疗效和预后影响因素。方法    回顾性分析复旦大学附属肿瘤医院1991-2005年收治的200例原发性腹膜后肿瘤病人的临床资料。结果    200例腹膜后肿瘤经病理确诊后，其中恶性158例，良性42例。恶性腹膜后肿瘤的完全切除率为64.5%，联合脏器切除率为33.5%。恶性腹膜后肿瘤完整切除者的5年存活率为69.3%，部分切除者的5年存活率为21.5%（P<0.05）。 结论    通过完善术前检查可以提高肿瘤完全切除率。肿瘤完全切除是降低原发性腹膜后肿瘤复发率，提高存活率的关键。

Diagnosis and treatment of primary retroperitoneal tumor：a clinical analysis of 200 cases        LONG Zi-wen, XU Yu，LIU Xiao-wen, et al. Department of Gastric and Soft Tissue Surgery, Fudan University Shanghai Cancer Center; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
Corresponding author: WANG Ya-nong, E-mail: wangyn1111@hotmail.com
Abstract    Objective    To analyze the surgical therapeutic effect and prognosis influencing factors of primary retroperitoneal tumors（PRPTs）. Methods    The clinical data of 200 cases of primary retroperitoneal tumor admitted between 1991 and 2005 in Shanghai Cancer Center, Fudan University were analyzed retrospectively. Results    Two hundreds cases of retroperitoneal tumor were diagnosed finally by surgery and pathology including 158 cases of malignant and 42 cases of benign. Complete resection rate of malignant retroperitoneal tumor was 64.5%, and combined organ resection rate was 33.5%. The 5-years survival rate of malignant retroperitoneal tumor performed complete resection was 69.3%, and the 5-years survival rate of partial resection was 21.5% (P<0.05). Conclusion    Complete preoperative examination can improve the complete resection rate of tumors. Complete resection is the only effective method for the treatment of PRPTs, and it is one of the major factors in reducing recurrence.