title: Abnormal Magnetic Resonance Imaging Findings in Patients With Sudden Sensorineural Hearing Loss: Vestibular Schwannoma as the Most Common Cause of MRI Abnormality.
abstract: The etiology of sudden sensorineural hearing loss (SSNHL) remains unclear in most cases. This study aimed to assess abnormal magnetic resonance imaging (MRI) findings in patients with SSNHL and evaluate the value of MRI in identifying the cause of SSNHL.A retrospective analysis of the charts and MRI findings of 291 patients with SSNHL was performed.In 291 patients, MRI abnormality, which was considered a cause of SSNHL, was detected in 13 patients. Vestibular schwannoma involving the internal auditory canal (IAC) and/or cerebellopontine angle was observed in 9 patients. All 9 patients had intrameatal tumors, and 6 of the 9 patients displayed extrameatal extension of their tumors. The tumor was small (<1 cm) or medium-sized (1.1-2.9 cm) in these 6 patients. Intralabyrinthine schwannoma, labyrinthine hemorrhage, IAC metastasis, and a ruptured dermoid cyst were each observed in 1 patient.The most commonly observed MRI abnormality in patients with SSNHL was vestibular schwannoma, and all of the lesions were small or medium-sized tumors involving the IAC.
authors.affiliation: From the Department of Otorhinolaryngology-Head and Neck Surgery (K-HJ, JES, C-HK); Department of Radiology; and Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, Republic of Korea (JWC).
authors.forename: Kyung-Hwa
authors.initials: KH
authors.lastname: Jeong
authors.forename: Jin Woo
authors.initials: JW
authors.lastname: Choi
authors.forename: Jung Eun
authors.initials: JE
authors.lastname: Shin
authors.forename: Chang-Hee
authors.initials: CH
authors.lastname: Kim
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D003937:Diagnosis, Differential; D005260:Female; D003639:Hearing Loss, Sudden / Q000000981:diagnostic imaging* / Q000209:etiology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009464:Neuroma, Acoustic / Q000000981:diagnostic imaging*; D012189:Retrospective Studies; D055815:Young Adult