Methods:14 patients with chronic otitis media and 14 with cholestatoma proved by surgically were scanned with HRCT.The authors put especially attention to the erosion of scutum and attic lateral wall.

• 方法：对手术证实的14例慢性中耳炎和14例中耳胆脂瘤的病人进行HRCT扫描，着重观察盾板和上鼓室外侧壁骨质改变。