YI-TSEN LINYI-HO YOUNG2023-02-172023-02-172008-01-0101945998https://scholars.lib.ntu.edu.tw/handle/123456789/628349Objective: This study retrospectively reviewed all cases of mid-frequency sudden deafness to understand the clinical significance of this hallmark finding. Study Design: Retrospective study. Subjects and Methods: From 1992 to 2006, a total of 556 patients with sudden deafness were experienced. Based on the audiographic configuration, these patients were classified into: flat-type group, 272 cases; high-frequency group, 146 cases; low-frequency group, 70 cases; mid-frequency group, 30 cases; and unclassified group, 38 cases. All patients underwent a battery of audiovestibular function testing. Results: Among 556 sudden deafness patients, 17 patients (3%) were proved to have a retrocochlear tumor, including mid-frequency group (10), high-frequency group (4), flat-type group (2), and low-frequency group (1). Thus, the mid-frequency group had significantly higher (33%) association with a retrocochlear tumor than other groups. Conclusion: One-third of the patients with mid-frequency sudden deafness harbor a true retrocochlear mass lesion; hence, MR imaging is mandatory in such cases. © 2008 American Academy of Otolaryngology-Head and Neck Surgery Foundation.enHEARING-LOSSjournal article10.1016/j.otohns.2007.10.008181649872-s2.0-37349048465WOS:000252283400003https://api.elsevier.com/content/abstract/scopus_id/37349048465