mastoid fontanelle

例句：

1. 1. The doctorperformed a mastoidectomy to removethe tumor.
   医生进行了乳突切除术来切除肿瘤。
2. 2. The patient's condition worsened after the mastoidectomy.
   患者进行乳突切除术后病情恶化。
3. 3. Mastoiditis is a common complicationof otitis media.
   乳突炎是中耳炎的常见并发症。