title: Diagnosis and surgical outcomes of intraparotid facial nerve schwannoma showing normal facial nerve function.
abstract: The findings of intraparotid facial nerve schwannoma (FNS) using preoperative diagnostic tools, including ultrasonography (US)-guided fine needle aspiration biopsy, computed tomography (CT) scan, and magnetic resonance imaging (MRI), were analyzed to determine if there are any useful findings that might suggest the presence of a lesion. Treatment guidelines are suggested. The medical records of 15 patients who were diagnosed with an intraparotid FNS were retrospectively analyzed. US and CT scans provide clinicians with only limited information; gadolinium enhanced T1-weighted images from MRI provide more specific findings. Tumors could be removed successfully with surgical exploration, preserving facial nerve function at the same time. Gadolinium-enhanced T1-weighted MRI showed more characteristic findings for the diagnosis of intraparotid FNS. Intraparotid FNS without facial palsy can be diagnosed with MRI preoperatively, and surgical exploration is a suitable treatment modality which can remove the tumor and preserve facial nerve function.
authors.affiliation: Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Republic of Korea.
authors.forename: D W
authors.initials: DW
authors.lastname: Lee
authors.forename: H K
authors.initials: HK
authors.lastname: Byeon
authors.forename: H P
authors.initials: HP
authors.lastname: Chung
authors.forename: E C
authors.initials: EC
authors.lastname: Choi
authors.forename: S-H
authors.initials: SH
authors.lastname: Kim
authors.forename: Y M
authors.initials: YM
authors.lastname: Park
mesh_terms: D000328:Adult; D000368:Aged; D044963:Biopsy, Fine-Needle; D003390:Cranial Nerve Neoplasms / Q000150:complications / Q000175:diagnosis* / Q000601:surgery; D005154:Facial Nerve / Q000000981:diagnostic imaging* / Q000601:surgery; D005158:Facial Paralysis / Q000209:etiology; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009442:Neurilemmoma / Q000150:complications / Q000175:diagnosis* / Q000601:surgery; D010306:Parotid Gland / Q000294:innervation* / Q000473:pathology / Q000601:surgery; D011183:Postoperative Complications / Q000517:prevention & control*; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome; D014463:Ultrasonography