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The imaging and the role of multislice computed tomography of otosclerosis
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Abstract
Objective: To describe the imaging characteristics of otosclerosis and to assess the role of multislice computed tomograph in diagnosis of this disease.
Methods: About 45 patients (31 females, 14 males), clinically diagnosed as otosclerosis or hearing loss with unknown
causes, underwent MSCT in Radiology Department between November 2013 and September 2014. All patients were surgically
confirmed in ENT Department of Bach Mai Hospital or National ENT Hospital. Assessmentis based on the classification of Veillon
and Portmann, comparing the differences of hearing threshold, bone and ABG between lesion-type groups and comparing with
surgery records.
Results: Mixed hearing loss accounts for the highest proportion. Regarding the affected sites on CT, the antefenestrum
was affected in 33 ears, the other sites are rare. The otosclerotic foci that greater than 1mm in diameter and not spreading into
the membrane in the cochleaare dominate. According to the classification of Veillon, type Ib and II account for the highest
percentage. When comparing the average air or bone conduction threshold and ABG between differents groups, there are no
statistically significant difference. The diagnostic value of CT scan in otosclerosis is up to 91.5% and its sensitivity and specificity are more than 95%.
Conclusion: MSCT is an useful method in the diagnosis of otosclerosis and in the differential diagnosis with others causes
of hearing loss.
Article Details
Keywords
Otosclerosis, the role of MSCT in diagnosis of otosclerosis.
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