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肾盂输尿管连接部梗阻引起的肾积水发病原因虽不太清楚,但多数认为是先天性的,可由于该处粘膜瓣、皱襞、狭窄、扭曲成角、输尿管高位连接、异位(迷走)血管等引起。多见于小儿。成人较少。国外报导一组非小儿组年龄在12～20岁间占26％,30～50岁间占20％。因此本病可发现于各个时期,应予注意。通过同位素肾图检查显示梗阻曲线,尿路造影、静脉滴注肾盂造影出现肾盏肾盂扩大而肾盂输尿管连接部梗阻以下输尿管正常时就可明确诊断。应除外腹膜后纤维化、结石、肿瘤、肾下垂、先天性畸形、邻近肿瘤压迫等引起的肾积水,其中须与膀胱输尿管返
Although the cause of hydronephrosis caused by ureteropelvic junction obstruction is not clear, most of them are considered as congenital. Due to the mucosal flap, folds, stenosis, twisted angulation, high ureteral connection, ectopic (vagal) blood vessels Caused by. More common in children. Fewer adults. Foreign reports of a group of non-pediatric group aged 12 to 20 years of age accounted for 26%, 30 to 50 years of age accounted for 20%. Therefore, the disease can be found in various periods, should be noted. Through the isotope nephrogram showed obstruction curve, urography, intravenous pyelography renal calyceal enlargement and ureteropelvic junction obstruction following the normal ureteral can be a clear diagnosis. Should be excluded retroperitoneal fibrosis, stones, tumors, renal ptosis, congenital malformations, adjacent to the tumor caused by hydronephrosis, which must be with the ureter and ureter