Materials and Methods Of 25 cases with ureteral stricture and upper hydroureterosis, 20 were due to ureterolithotomy and 5 non-external compressive stricture of unknown cause.

• 材料与方法25例经影像学确诊为输尿管狭窄并上尿路积水中，20例为输尿管取石术后狭窄，5例为不明原因非外压性狭窄。