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Background: Tinnitus is the recognition of sound in the absence of any external auditory stimulus to the noise of ringing in the ears. Middle ear aeration carries important role for ossicular coupling and normal hearing. There is restricted morphometric data on the cases with bilateral tinnitus. Materials and methods: In this study we evaluated hearing findings of 18 cases with subjective nonpulsatile bilateral tinnitus and also morphometry and volumetry of temporal bone substructures on the computed tomography images using stereological method compared with the gender and age matched 12 healthy subjects. Duration of tinnitus, exposing acoustic trauma or/and high level noise levels, evaluation of middle ear volume, jugular bulb levels, distances between jugular bulb and both oval window and middle ear were evaluated. Results: Both males and females with tinnitus showed worse hearing thresholds through bone and air conductions than healthy subjects but it was not statistically significant. Pure tone thresholds through bone and air conductions were not statistically different in both sexes with bilateral tinnitus. Right middle ear volume of the cases with bilateral tinnitus was mean 5.57 cm³ for males and 5.64 cm³ for females; and also the left middle ear volume of the cases with bilateral tinnitus was mean 5.87 cm³ for males and 5.65 cm3 for females. There were no significant differences between the cases with bilateral tinnitus and the control subjects according to the side of the body. Conclusions: The data on the hearing findings and morphometrical evaluation of the cases with bilateral tinnitus may be important for anatomists and clinicians. (Folia Morphol 2018; 77, 1: 57–64)
The aim of this multicentric study was carried out to compare the anatomical structures of temporal bones in patients with unilateral tinnitus in healthy ears. We also aimed at evaluating whether age- and gender-related asymmetrical changes occur in temporal bones or not. Fifty-two ears of 26 patients who had unilateral tinnitus were included into the retrospective study. The patients who had subjective nonpulsatile tinnitus and who previously had temporal computed tomography according to their file records were accepted to the study. Temporal computed tomography scans and audiometric results of patients were examined retrospectively. Middle ear volume, diameter of internal acoustic meats, and diameter of jugular bulb were evaluated by both anatomist and radiologist, in an interobserver manner. Internal acoustic meats and jugular bulb were found to be larger in the ears that had tinnitus than in the healthy ears; however, there was no statistical significance. The stereological morphometric study of the correlation with sex of temporal bone asymmetry in humans is of importance for both otolaryngologists and anatomists. These results will contribute to data on middle ear volume, internal acoustic meats, and jugular bulb sizes. (Folia Morphol 2013; 72, 1: 22–28)
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