先天性外耳道狭窄内段因鳞状细胞脱屑蓄积易形成胆脂瘤。本文从600例先天性耳畸形中检出50例(54耳)外耳道狭窄患者(狭窄的界限是指外耳道直径≤4mm),其中14例为双耳,33耳做了手术。54耳中有26耳(48%)有胆脂瘤。作者提出患者年龄与狭窄程度对胆脂瘤的形成是两项重要参数。文中3岁以下患儿均未发现有胆脂瘤。12岁以下只有一例有胆脂瘤, Congenital external auditory canal stenosis due to the formation of squamous cell scaling within the accumulation of easy to form cholesteatoma. In this paper, 50 cases (54 ears) of external auditory canal stenosis were detected from 600 cases of congenital ear deformity (stenosis limit refers to the diameter of external auditory meatus ≤4mm), of which 14 cases were binaural and 33 cases were operated on. There were 26 ears (48%) with cholesteatoma in 54 ears. The authors suggest that the age and degree of stenosis in patients with cholesteatoma formation are two important parameters. In this paper, no patients with cholesteatoma were found in children under 3 years of age. Only one case under the age of 12 had cholesteatoma,