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Chondromyxoid fibroma of the mastoid facial nerve canal mimicking a facial nerve schwannoma

✍ Scribed by Andrew L. Thompson; Aditya Bharatha; Richard I. Aviv; Julian Nedzelski; Joseph Chen; Juan M. Bilbao; John Wong; Reda Saad; Sean P. Symons

Publisher: John Wiley and Sons
Year: 2009
Tongue: English
Weight: 232 KB
Volume: 119
Category: Article
ISSN: 0023-852X
DOI: 10.1002/lary.20486

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✦ Synopsis

Abstract

Chondromyxoid fibroma of the skull base is a rare entity. Involvement of the temporal bone is particularly rare. We present an unusual case of progressive facial nerve paralysis with imaging and clinical findings most suggestive of a facial nerve schwannoma. The lesion was tubular in appearance, expanded the mastoid facial nerve canal, protruded out of the stylomastoid foramen, and enhanced homogeneously. The only unusual imaging feature was minor calcification within the tumor. Surgery revealed an irregular, cystic lesion. Pathology diagnosed a chondromyxoid fibroma involving the mastoid portion of the facial nerve canal, destroying the facial nerve. Laryngoscope, 2009

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