diverticulum of bladder

例句：

1. 1. The doctor removed thediverticulum to prevent infection.
   医生切除了小囊以防止感染。
2. 2. The patienthad a diverticulum that neededto be drained.
   病人有一个需要引流的小囊。
3. 3. The diverticulum wasfilled with fluid and required immediate surgery.
   这个小囊充满了液体，需要立即手术。