It may be caused by obstruction, if hydronephrosis is complicated with bilateral hydroureterosis or hydronephrosis becomes more serious dynamically.
肾盂积水伴双侧输尿管积水者动态观察，积水加重者，多与泌尿系梗阻有关。
The stasis from obstruction predisposes to infection. The obstruction can also lead to bilateral hydroureter and hydronephrosis.
阻塞导致的郁积易于引起感染，同时阻塞还能引起双侧的输尿管积水和肾盂积水。
Renal ultrasound showed bilateral enlargement without hydronephrosis.
肾脏超音波显示双侧肾肿大且无水肾。
Renal ultrasound showed bilateral enlargement without hydronephrosis.
肾脏超音波显示双侧肾肿大且无水肾。
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