renal pelvis

例句：

1. 1. The patient had a kidney pelvis infection that required immediate treatment.
   患者患有肾盂感染，需要立即治疗。
2. 2. The kidney pelvis was enlarged due to the presence of a large stone.
   由于结石的存在，肾盂变大了。
3. 3. The patient was admitted to the hospital for treatment of a renal cyst.
   患者因肾盂积水被送往医院治疗。