原发性输尿管肿瘤临床少见，约占泌尿系肿瘤的1％［’］。我院自1981年至1998年收治20例规就其临床表现与术前诊断作一分析，报告如下。1．临床资料本组20例，男16例，女4例，男女之比为4：1；年龄34岁一74岁，平均52．4岁；左侧14例，右侧6例S上段6例，中段4例，下段10例；病 Primary ureteral tumors are rare, accounting for about 1% of urological tumors [’]. Our hospital from 1981 to 1998 admitted 20 cases of its clinical manifestations and preoperative diagnosis for an analysis, the report is as follows. 1. Clinical data The group of 20 patients, 16 males and 4 females, the ratio of male to female 4: 1; aged 34 years old to 74 years old, average 52.4 years old; on the left in 14 cases, 6 cases of S on the right side in 6 cases, 4 cases in the middle, 10 cases in the lower part;