submucosal abscess of rectum

例句：

1. 1.He developed a submucosal abscess in his lower back after an infection.
   他因感染在背部下部发展了一个黏膜下脓肿。
2. 2. The patient required emergency surgery to drain the submucosal abscess.
   患者需要紧急手术来排空黏膜下脓肿。
3. 3.The doctor advised him to seek medical attention immediately for the submucosal abscess.
   医生建议他立即寻求医疗帮助处理这个黏膜下脓肿。