foreign body of mastoid

例句：

1. 1. The doctor performed amastoidectomy on the patient.
   医生为患者进行了鼓膜切除术。
2. 2. Mastoiditis is a condition that affects themiddle ear.
   中耳炎是一种影响中耳的状况。
3. 3.Mastoid surgery involves removing the outerlayer of the skull to access the innerear.
   鼓室手术涉及去除颅骨的外层以进入内耳。