We present a unique case in which an infra-temporal arachnoid cyst eroded the tegmen tympani that caused conductive hearing loss, CSF otorrhea, and repeated meningitis.

• 本文报告-因颞下部蛛纲膜囊肿侵蚀中耳鼓室顶而造成传导性听力丧失、脑脊髓液耳漏以及反覆性脑膜炎发作症状的病例；