本文报导外半规管迷路瘘(120例);其它尚有上半规管瘘(3例)、后半规管瘘(3例)、鼓岬瘘(3例)、前庭窗瘘(2例)、耳蜗瘘(1例)。 120例外半规管瘘中20例发生于已作手术的术腔;70％发生于长期且处理不当的胆脂瘤病例;初诊时22％患侧已聋、27％骨导低于30dB。 This article reported the other half of the canal fistula fistula (120 cases); the other there are still upper semicircular canal fistula (3 cases), the posterior semicircular canal fistula (3 cases), drum cavernous fistula (3 cases), vestibular fistula (2 cases) example). Twenty of the 120 semiconcuated fistulas occurred in the operated surgical cavity; 70% occurred in long-term and inappropriately treated cases of cholesteatoma; 22% of the affected patients had deafness at the time of first visit and 27% had less than 30 dB of osteoconduction.