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A clinica1 observation was made on the 14 inpatient cases of ureteral obstruction which were not originated from calculi or tuberculous nature in the Department of Urology, Korea University College of Medicine during the period of 1 year from Sep. 1973 to Aug. 1974, and following results were obtained: 1. As to the origin of the obstruction, 4 cases of ureteral fibrosis, 2 cases of aberrant vessel, and one congenital ureteral stricture, one ureteral tumor, one ureterocele, one periureteral fibrosis, and one case of ureteral ligation during the radical total hysterectomy. 2. As to the location of the ureteral stricture, the upper ureter in 9 cases. middle ureter in o2e case and lower ureter in 4 cases. 3. The surgical treatment employed were nephrectomy in 6 cases, pyeloplasty in 5, ureteroneocystostomy in 1, ureteral dilation in 1 and transurethral resection in 1 case.
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