对 10例中耳胆脂瘤的听骨进行透射电镜观察 ,发现胆脂瘤对听骨组织表层变化明显 ,而对骨深层变化较小 ,骨细胞逐渐趋向游离状态 ,并出现返幼倾向 ,在锤骨头中心可见正常骨髓腔。1　临　床　资　料1.1　一般资料 :①本组 10例患者 ,均有耳流脓病史 ,长者 2 1年 ,短者 1年。男性 Ten cases of middle ear cholesteatoma were observed by transmission electron microscopy. The results showed that cholesteatoma had obvious changes on the surface of the auditory bone tissue, but had little change in the deep layer of the bone. The osteocytes gradually tended to be free, Hammer bone center visible normal bone marrow cavity. 1 Clinical data 1.1 General information: ① The group of 10 patients, have a history of ear pus, the elderly 21 years, the short one year. male