自1990年1月～1996年12月我们共收治肾盂输尿管连接部梗阻（Pelvil—ureterJunctionOstruction，PUJO）87例。根据Rickwood肾积水分度法[1]，其中被确认为重度以上积水肾共17侧14例，约占16%。就重度以上积水肾的功能评估，从而对其手术中切除患肾或保留之行成形进行探讨，报告 From January 1990 to December 1996 we treated 87 cases of pelvis-ureter junctional obstruction (PUJO). According to Rickwood hydronephrosis [1], which was confirmed as severe hydronephrosis in 17 sides of 14 cases, accounting for about 16%. On severe hydronephrosis function assessment, so as to remove the operation of its affliction or the formation of the line to discuss, report