作者曾对一松弛部型胆脂瘤患者用内置法修补鼓膜,术后发生了由于手术而引起的新的胆脂瘤。作者认为松弛部型胆脂瘤有以下特点:(1)胆脂瘤一般在20岁以后发病;(2)乳突气房发育受抑制;(3)鼓膜紧张部接近正常,中鼓室、镫骨、咽鼓管口等处无明显病变、咽鼓管通气良好;(4)上、中鼓室间被阻断;(5)胆脂瘤在松弛部皮肤的凹陷内呈袋状向乳突腔发展;(6)术后再发的松弛部胆脂瘤表现与上述相同。作者又用家兔作人工胆脂瘤试验,发现在封闭咽鼓管鼓口并置入明胶海绵后,中耳腔、鼓膜内面均有肉芽增生,肉芽还发展到外耳道内段皮 The authors have used a built-in repair of tympanic membrane in patients with a sagittal partial cholesteatoma, and new cholesteatoma occurred after surgery. The authors suggest that the cholesteatoma of sagittal section has the following characteristics: (1) cholesteatoma usually occurs after 20 years of age; (2) the development of the mastoid air chamber is inhibited; (3) the tympanic membrane is close to normal, , Eustachian orifice and other no obvious lesions, Eustachian tube ventilation is good; (4), the middle and the tympanic cavity was blocked; (5) cholesteatoma in the sag of the sagging skin to the mastoid cavity ; (6) postoperative recurrence of cholesteatoma relaxation and performance of the same. The author also used rabbits as artificial cholesteatoma test and found that in the closure of eustachian tube and gelatin sponge into the mouth, the middle ear cavity, tympanic membrane inside have granulation proliferation, granulation also developed to the external auditory meatus segment