内耳摘出を余儀なくされた巨大な錐体部真珠腫の１例

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  • A case report of a large size cholesteatoma involving the labyrinth.

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A 46-year-old man complaining of a hearing loss in the right ear for three years was found a large size cholesteatoma involving the petrous apex by CT and MRI. The patient had no vertigo, facial palsy and tinnitus. A defect of the attic bone and the retracted paras fracida of his right ear drum were observed. The cholesteatoma was surgically removed under general anesthesia by transmastoid approach and the labyrinth was removed for complete extirpation of the lesion extended into the retro and infralabyrinthine areas. The widely exposed dura mata of the middle and posterior cranial fossa was covered with a temporal muscle flap and postoperative spaces of the temporal bone were filled with a graft of abdominal subcutaneous fat. No reccurence was found after the surgical procedure.

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