现代耳外科发展表明:鼓环后上骨壁隆起及鼓索在防止鼓膜后部内陷袋的形成上起着重要作用。鼓环后上骨壁缺损可能是先天性、病理性、或手术造成。这种缺损5—15％可以形成胆脂瘤;若同时伴有咽鼓管功能失常和鼓膜后部内陷,使鼓膜与砧镫关节或镫骨脚相连,则可产生砧镫关节、砧骨长脚或镫骨脚的破坏而影响听力。作者报导1971—1972年用耳廓软骨-软骨膜移植片治疗鼓膜后部内陷袋10例。术中若取耳后切口,可自切口分开皮肤及皮下组织直达耳廓软骨并取材。若取耳内切口,则在耳廓后最突起处 The development of modern otolaryngology shows that the bulging of the posterior wall of the bulging ring and drum string plays an important role in preventing the formation of the invagination pocket at the posterior portion of the tympanic membrane. The posterior wall defect may be congenital, pathological, or surgical. 5-15% of this defect can form cholesteatoma; if accompanied by eustachian tube dysfunction and posterior tympanic retraction, so that the tympanic membrane and ankle joint or tarsal foot connected, can produce anvil and ankle joint, ankle length Foot or tarsal foot damage and affect hearing. The authors report 10 cases of posterior tympanic retraction bags treated with auricular cartilage-perichondrial graft from 1971 to 1972. If surgery after ear ear incision, the skin can be separated from the incision and subcutaneous tissue directly to the auricle cartilage and drawn. If you take the ear incision, the most prominent in the ear after the Department