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作者们在1970～1980年间作了1071例胆脂瘤手术,其中822例为封闭式,上鼓室胆脂瘤占80%。封闭式胆脂瘤手术的失败原因之一是袋状内陷的复发。其观点有二:一为残余性胆脂瘤:主要是手术时,表皮的碎片遗留在中耳腔发展而成;或为袋状内陷(真性复发):一种新的袋状表皮组织套叠在外耳道,最常见的是鼓膜移植,乳突鼓窦表皮鳞屑潴留而构成新的胆脂瘤。内陷可起始于上鼓室外侧壁,即中耳胆脂瘤的好发部位,或起始于骨性外耳道后壁的医源性裂隙。袋状内陷的形成与咽鼓管功能的慢性紊乱和中耳管腔的负压有关。
The authors made 1071 cases of cholesteatoma surgery between 1970 and 1980, of which 822 were closed and the upper tympanic cholesteatoma accounted for 80%. One of the reasons for the failure of closed cholesteatoma surgery is the recurrence of sockets. The view is twofold: one for residual cholesteatoma: mainly surgery, the epidermal fragments left in the middle ear cavity development; or pocket invagination (true recurrence): a new pocket epidermal tissue sheath Stacked in the external auditory canal, the most common is the tympanic membrane transplantation, mastoid sinusoidal squamous cell retention and constitute a new cholesteatoma. Invagination may begin on the outer side wall of the upper drum, ie, the predilection site for middle ear cholesteatoma, or iatrogenic fissures that begin in the posterior wall of the bony external auditory canal. The formation of pouch-like retraction and Eustachian tube function of chronic disorders and the middle ear cavity negative pressure.