[Diagnosis and treatment of hydronephrosis: report of 100 cases].

One hundred patients with hydronephrosis were treated for 10 years. In 88 patients operations confirmed the causes of obstruction including pyelo-ureteral junction obstruction (pujo, 46 cases), anomalous (15), retroperitoneal fibrosis (15), ureteral polyps and valves and others (12). In accordance with etiology and renal function pyeloplasty was carried out in 31 cases, nephrectomy 37 and nephrostomy 12; other operation was done in 20 cases. The successful rate of pyeloplasty was 91.3%. Early diagnosis and treatment of hydronephrosis is key for reserving renal function. Renal r-scan, percutaneous nephrostomy are useful in judging renal function. Dual-Flex stent internal drainage is better than external drainage when pyeloplasty is done.