pyonephrosis

例句：

1. 1.The patient was diagnosed with pyonephrosis and required immediate surgery.
   患者被诊断出患有肾盂积水，需要立即进行手术。
2. 2. Pyonephrosis is a serious condition that can lead to kidney failure if left untreated.
   肾盂积水是一种严重的状况，如果不治疗，可能会导致肾脏功能衰竭。
3. 3. The doctor recommended the patient to undergo regular check-ups and treatment for pyonephrosis.
   医生建议患者定期进行体检和治疗肾盂积水。