psoas abscess

例句：

1. 1. He developed a psoas abscess after an injury to his back.
   他背部受伤后发展成了腰骶部脓肿。
2. 2. The patient was admitted to the hospital for treatment of a psoas abscess.
   病人因腰骶部脓肿被送进医院治疗。
3. 3.The doctor advised him to seek medical attention immediately if he experienced any symptoms of a psoas abscess.
   如果医生发现有腰骶部脓肿的症状，会建议他立即就医。