原发性肾盂输尿管连接部(UPJ)梗阻因发病隐匿,积水呈渐进性,症状轻微,所以常延误诊治。我们从1995年7月至2005年3月共收治这类患者42例,采用小切口离断性肾盂成形术治疗,取得满意的疗效。报告如下。1资料与方法1·1一般资料本组42例,男30例,女12例,年龄8~54岁,平均35岁;左侧25 Primary ureteropelvic junction (UPJ) obstruction due to occult onset, hydrocephalus progressive, mild symptoms, it is often delayed diagnosis and treatment. We from July 1995 to March 2005 were treated 42 cases of such patients were treated with small incision pyeloplasty, and achieved satisfactory results. The report is as follows. 1 Materials and Methods 1.1 General Information The group of 42 patients, 30 males and 12 females, aged 8 to 54 years, mean 35 years; the left 25