患儿,男,8岁。因左耳后间歇性流脓半年。于1985年10月16日入院。体检:全身情况良好。左外耳道干燥,耳膜完整,瘘管试验阴性,无眼震及面瘫;右乳突部可见0.5×1cm大小瘘口,其内有肉芽组织。电测听左耳气导、骨导基本正常。X线片示:左耳鼓窦明显扩大,骨质破坏区4×3cm,边缘致密,部分向内延伸形成花边样。临床诊断:左耳先天性胆脂瘤并发耳后瘘管。于10月22日在全麻下行左侧改良性乳突根治术,去除筛区表面肉芽组织时,有稀薄脓溢出,吸尽后发现乳突骨皮质有0.4×0.5cm骨破区坏。术中发 Children, male, 8 years old. Intermittent empyema for six months after the left ear. On October 16, 1985 admission. Physical examination: the whole body is in good condition Left external auditory canal dry, complete eardrum, fistula test negative, non-nystagmus and facial paralysis; right mastoid visible 0.5 × 1cm size fistula, which has granulation tissue. Electrical measurement of left ear air conduction, bone conduction basically normal. X-ray film shows: left ear drum sinus significantly expanded bone destruction area 4 × 3cm, the edge of the dense, part of the inward extension of the formation of lace-like. Clinical diagnosis: left ear congenital cholesteatoma complicated by ear fistula. On October 22 underwent general anesthesia on the left side of the modified mastoidectomy, remove the sieve surface granulation tissue, there is an overflow of thin pus, exhausted and found mastoid cortex 0.4 × 0.5cm bone broken area bad. Intraoperative hair