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Free Content Imaging and Clinical Characteristics of Parotid Facial Nerve Schwannoma

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Intraparotid facial nerve schwannomas can be mistaken for pleomorphic adenomas on imaging and cytology, which may lead to unnecessary surgery and facial nerve injury. We reviewed 10 cases from our institutional data base and present the imaging and clinical characteristics that characterize intraparotid facial nerve schwannoma. Clinicoradiographic features include an asymptomatic parotid mass along the expected course of the intraparotid main facial trunk, “target sign” on MR imaging, and benign osseous expansion of the stylomastoid foramen effacing the fat pad.
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Keywords: PFNS = intraparotid facial nerve schwannoma

Document Type: Research Article

Publication date: January 1, 2016

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  • Neurographics is the peer-reviewed, bimonthly educational journal of the American Society of Neuroradiology. The journal comprises articles selected from material presented at the ASNR Annual Meeting. Neurographics also publishes other high-quality submissions that are primarily educational and have a high emphasis on a pictorial approach. Neurographics offers CME credit for reading review articles and completing quiz-based self-assessment activities. CME credit for review articles may be claimed up to 3 years after an article's publication date. Visit to view all available CME courses.
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