외이도 종물로 발견된 청신경종 1예

Abstract

Acoustic neuromas arise frequently within the internal auditory canal and cerebellopontine angle. Rarely, a schwannoma may occur primarily within the labyrinth or may extend secondarily into the labyrinth from the internal auditory canal. The authors experienced a very rare case of acoustic neuroma presenting as a tumor of the external auditory canal in a 43 year-old woman. Tumor was removed by a transotic approach and found to be present in the external auditory canal, middle ear, labyrinth, internal auditory canal and cerebellopotine angle. Subtotal resection of the tumor was performed due to severe adhesions to the facial nerve in the proximal internal auditory canal. Serial magnetic resonance imaging is planned to follow up the residual tumor.