title: Audiologic evaluation of vestibular schwannoma and other cerebellopontine angle tumors.
abstract: CONCLUSIONS
  Otologic accompanying symptoms, audiogram patterns, and hearing levels according to tumor size differed in patients with CPA tumors classified as VS and non-VS types.
  
  
  OBJECTIVE
  The diagnosis of CPA tumors is often delayed. Late-diagnosed tumors can grow until they compress and damage vital structures. This study evaluated the otologic symptoms and results of audiologic tests in patients with vestibular schwannomas (VS) and other types of CPA tumors.
  
  
  METHODS
  This study included 171 patients with otologic symptoms who were diagnosed with CPA tumors, including 116 with VS and 55 with other types of CPA tumors. Factors analyzed retrospectively included tumor type, size, and location and the results of audiometric examinations.
  
  
  RESULTS
  The most common chief complaint in patients diagnosed with CPA tumors was asymmetrical hearing loss, with most frequent accompanying symptoms being tinnitus in patients with VS and dizziness in those with other types of CPA tumor. The most frequent patterns of hearing loss were the descending type in patients with VS and the flat type in patients with non-VS tumors (p < 0.05). Pure tone thresholds tended to increase more in patients with VS than non-VS tumors according to tumor size, and pure tone averages were significantly higher in patients with VS than non-VS tumors of 11-25 mm in size (p < 0.05).
authors.affiliation: a Department of Otorhinolaryngology-Head and Neck Surgery.
authors.forename: Sang Hoon
authors.initials: SH
authors.lastname: Kim
authors.affiliation: b Department of Neurosurgery, School of Medicine , Kyung Hee University , Seoul , Korea.
authors.forename: Sung Ho
authors.initials: SH
authors.lastname: Lee
authors.affiliation: b Department of Neurosurgery, School of Medicine , Kyung Hee University , Seoul , Korea.
authors.forename: Seok Keun
authors.initials: SK
authors.lastname: Choi
authors.affiliation: b Department of Neurosurgery, School of Medicine , Kyung Hee University , Seoul , Korea.
authors.forename: Young Jin
authors.initials: YJ
authors.lastname: Lim
authors.affiliation: a Department of Otorhinolaryngology-Head and Neck Surgery.
authors.forename: Se Young
authors.initials: SY
authors.lastname: Na
authors.affiliation: a Department of Otorhinolaryngology-Head and Neck Surgery.
authors.forename: Seung Geun
authors.initials: SG
authors.lastname: Yeo
mesh_terms: D001301:Audiometry, Pure-Tone / Q000379:methods*; D016057:Evoked Potentials, Auditory, Brain Stem / Q000502:physiology*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009464:Neuroma, Acoustic / Q000175:diagnosis* / Q000503:physiopathology; D012189:Retrospective Studies; D012720:Severity of Illness Index
keywords: Cerebellopontine angle tumor; audiometry; auditory brain stem response; vestibular schwannoma