Diagnosis and surgical outcomes of intraparotid facial nerve schwannoma showing normal facial nerve function
D.W. Lee ; H.K. Byeon ; Y.M. Park ; S.-H. Kim ; E.C. Choi ; H.P. Chung
International Journal of Oral and Maxillofacial Surgery, Vol.42(7) : 874~879, 2013
International Journal of Oral and Maxillofacial Surgery
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.