congenital hydronephrosis

例句：

1. 1. The child was diagnosed with congenital hydronephrosis and required immediate surgery.
   这个孩子被诊断出患有先天性肾积水，需要立即进行手术。
2. 2. The patient's condition worsened due to untreated congenital hydronephrosis.
   由于未治疗的先天性肾积水，患者的病情恶化了。
3. 3. Congenital hydronephrosis is a rare but serious condition that requires specialized medical care.
   先天性肾积水是一种罕见但严重的状况，需要专门的医疗照顾。