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Polat C, Baykara M, Ergen B. Evaluation of internal auditory canal structures in tinnitus of unknown origin. Clin Exp Otorhinolaryngol. 2014;7(3):160-4doi: 10.3342/ceo.2014.7.3.160.
Polat, C., Baykara, M., & Ergen, B. (2014). Evaluation of internal auditory canal structures in tinnitus of unknown origin. Clinical and experimental otorhinolaryngology, 7(3), 160-4. https://doi.org/10.3342/ceo.2014.7.3.160
Polat, Cahit, et al. "Evaluation of internal auditory canal structures in tinnitus of unknown origin." Clinical and experimental otorhinolaryngology vol. 7,3 (2014): 160-4. doi: https://doi.org/10.3342/ceo.2014.7.3.160
Polat C, Baykara M, Ergen B. Evaluation of internal auditory canal structures in tinnitus of unknown origin. Clin Exp Otorhinolaryngol. 2014 Sep;7(3):160-4. doi: 10.3342/ceo.2014.7.3.160. Epub 2014 Aug 01. PMID: 25177429; PMCID: PMC4135149.
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Clin Exp Otorhinolaryngol. 2014 Sep;7(3):160-4. doi: 10.3342/ceo.2014.7.3.160. Epub 2014 Aug 01.

Evaluation of internal auditory canal structures in tinnitus of unknown origin.

Clinical and experimental otorhinolaryngology

Cahit Polat, Murat Baykara, Burhan Ergen

Affiliations

  1. Department of Otolaryngology, Elazig Training and Research Hospital, Elazig, Turkey.
  2. Department of Radiology, Elazig Training and Research Hospital, Elazig, Turkey.
  3. Department of Computer Engineering, Faculty of Engineering, Firat University, Elazig, Turkey.

PMID: 25177429 PMCID: PMC4135149 DOI: 10.3342/ceo.2014.7.3.160

Abstract

OBJECTIVES: The aim of the present study was to evaluate the internal auditory canal (IAC) and the nerves inside it to define possible structural differences in cases with subjective tinnitus of unknown origin.

METHODS: Cases applying to the ear, nose and throat department with the complaint of tinnitus with unknown origin and having normal physical examination and test results were included in the study (n=78). Patients admitted to the radiology clinic for routine cranial magnetic resonance imaging (MRI) and whose MRI findings revealed no pathologies were enrolled as the control group (n=79). Data for the control group were obtained from the radiology department and informed consent was obtained from all the patients. Diameters of the IAC and the nerves inside it were measured through enhanced images obtained by routine temporal bone MRIs in all cases. Statistical evaluations were performed using Student t-test and statistical significance was defined as P<0.05.

RESULTS: Measurements of IAC diameters revealed statistically significant differences between the controls and the tinnitus group (P<0.05). Regarding the diameters of the cochlear nerve, facial nerve, inferior vestibular nerve, superior vestibular nerve, and total vestibular nerve, no statistically significant difference was found between the controls and the tinnitus group.

CONCLUSION: Narrowed IAC has to be assessed as an etiological factor in cases with subjective tinnitus of unknown origin.

Keywords: Cochlear nerve; Diameter of internal auditory canal; Facial nerve; Magnetic resonance imaging; Tinnitus; Vestibular nerve

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