Practica Oto-Rhino-Laryngologica
Online ISSN : 1884-4545
Print ISSN : 0032-6313
ISSN-L : 0032-6313
Original articles
Intraparotid Facial Nerve Schwannoma Treated with Intracapsular Resection
Munenaga NakamizoKazuhiko YokoshimaTatsumasa HanedaAyako SakumaTomonobu KamioMunenori Yokoyama
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2011 Volume 104 Issue 5 Pages 341-346

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Abstract
Intraparotid facial nerve schwannoma, an uncommon tumor documented sporadically in medical literature, must be differentiated from pleomorphic adenoma. Function-preserving surgical resection is also important. We report a case of intraparotid facial nerve schwannoma in a 42 year-old woman seen for a right parotid gland tumor 28 mm in diameter. Computed tomography (CT) and Magnetic resonance imaging (MRI) showed a noninvasive round mass between the tip of the mastoid process and the mandibular condyloid process. Fine-needle aspiration cytology confirmed a benign mass consisting of histiocytes or interstitial cells, although preoperative tests could not differentiate schwannoma from pleomorphic adenoma. Surgical exploration found a yellow encapsulated mass arising in the main facial nerve trunk and the nerve funiculus extending into the capsule. A surgeon diagnosed a facial neurogenic tumor, which was resected intracapsularly leaving no tumor tissue in surgical microscopy. Postoperative facial palsy eventually disappeared, completely restoring facial nerve function. No recurrence has been seen in the 7 years and 8 months since surgery, indicating that intracapsular resection may be an intraparotid schwannoma treatment providing a favorable prognosis.
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© 2011 The Society of Practical Otolaryngology
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