腹膜后病变常见为特发性纤维化,本文报道大约50%腹膜后病变为肿瘤所引起。据统计,腹膜后肿瘤不多见,死亡率为3例/百万男性人口,在病理教科书中对此病介绍的很少,有的书中将其合并在腹膜病变中讲解。本文研究了腹膜后肿瘤的临床病理特点。材料和方法作者复习了49例腹膜后肿瘤病例,男性42例,女性7例,平均年龄46.7岁(10岁-81岁)。患者症状因人而异,腹痛最常见(18例),常伴有肿块。12例有腹部膨胀、11例有泌尿系统症状、6例有下肢静脉或神经受压表现、另有6例肿瘤系因其它疾病进行诊治时偶然发现。对23例行根治性肿瘤 Retroperitoneal lesions are often idiopathic fibrosis, and it is reported that approximately 50% of retroperitoneal lesions are caused by tumors. According to statistics, retroperitoneal tumors are rare, the mortality rate is 3 cases/million male population, and it is rarely described in pathological textbooks. In some books, it is incorporated in peritoneal lesions. This article studies the clinicopathological features of retroperitoneal tumors. Materials and Methods The author reviewed 49 cases of retroperitoneal tumors, including 42 males and 7 females, with an average age of 46.7 years (10-81 years). The patient’s symptoms vary from person to person, with abdominal pain being the most common (18 cases) and often accompanied by lumps. Twelve patients had abdominal distention, 11 had urinary symptoms, 6 had lower limb veins or nerve compression, and another 6 had accidental findings when diagnosed with other diseases. 23 cases of radical tumors