Temporal bone meningiomas

Meningiomas involving the temporal bone may originate from arachnoid cell n ests present within the temporal bone (intratemporal), but more frequently originate from arachnoid cell nests of the posterior or middle cranial foss a with Secondary;invasion of the TB (extratemporal). In this study. we retr ospectively reviewed the Charts of 13 patients with meningiomas involving t he temporal bone who underwent surgery. Tumors of the posterior fossa with only temporal bone hyperostosis, but without invasion, were excluded. Patie nts presented primarily with otologic symptoms and signs. The tumors origin ated in the temporal bone (5/13), jugular foramen (4/13) petroclival region ,(2/13), the asterion(1/13) or the internal auditory meatus (1/13). All of the intratemporal meningiomas had the radiological appearance of en-plaque menigiomas. The tumor extended into the middle ear (11/13), eustachian tube (5/13), and/or the labyrinth (3/13) A gross total resection was achieved i n II patients and a subtotal resection in 2 patients. The lower cranial ner ves were infiltrated by tumor in 4 patients, and were sacrificed. At a mean follow-up of approximately 6 years, 12 patients are currently alive and do ing well and 1 died from tumor progression. Six patients showed tumor recur rence and were reoperated on (5/6) or followed conservatively (1/6), Surgic al treatment of temporal one meningiomas is associated with high recurrence rate due to indiscreet tumor margins. Combined surgical approaches (tempor al craniotomy and mastoidectomy) by neurosurgical and otological terms are recommended for meningiomas originating in the temporal bone.