输尿管第一狭窄50%位于肾盂输尿管移行区，50%位于近段输尿管。

The 50% first stenosis is located in the ureteropelvic junction and another 50% is located in the upper ureter.

youdao

输尿管第一狭窄50%位于肾盂输尿管移行区，50%位于近段输尿管。

The 50% first stenosis is located in the ureteropelvic junction and another 50% is located in the upper ureter.

youdao