anal fistula

例句：

1. 1. The patient developed a severe anal fistula after surgery.
   这名患者在手术后发展成了严重的肛门瘘管。
2. 2. The doctor advised him to seek medical attention immediately for the anal fistula.
   医生建议他立即就医治疗这个肛门瘘管。
3. 3. The patient was treated for the anal fistula with antibiotics and rest.
   患者接受了抗生素和休息治疗肛门瘘管。