J Neurol Surg B Skull Base 2021; 82(04): 476-483
DOI: 10.1055/s-0040-1714107
Original Article

A Comparison of Diagnostic Accuracy of Superior Semicircular Canal Dehiscence in MDCT and MRI, and Coexistence with Tegmen Tympani Dehiscence

Mikail Inal
1  Radiology Department, Kırıkkale University, Faculty of Medicine, Kırıkkale, Turkey
,
Nuray Bayar Muluk
2  ENT Department, Kırıkkale University, Faculty of Medicine, Kırıkkale, Turkey
,
Mehmet H. Şahan
3  Radiology Department, Gaziantep University, Faculty of Medicine, Gaziantep, Turkey
,
Neşe Asal
1  Radiology Department, Kırıkkale University, Faculty of Medicine, Kırıkkale, Turkey
,
Gökçe Şimşek
2  ENT Department, Kırıkkale University, Faculty of Medicine, Kırıkkale, Turkey
,
Osman K. Arıkan
4  ENT Department, Adana Orta Doğu Hospital, Adana, Turkey
› Author Affiliations
Funding None.

Abstract

Objective Tegmen tympani dehiscence in temporal multidetector computed tomography (MDCT) and superior semicircular canal dehiscence may be seen together. We investigated superior semicircular canal dehiscence in temporal MDCT and temporal magnetic resonance imaging (MRI).

Methods In this retrospective study, 127 temporal MRI and MDCT scans of the same patients were reviewed. In all, 48.8% (n = 62) of cases were male, and 51.2% (n = 65) of cases were female. Superior semicircular canal dehiscence and superior semicircular canal-temporal lobe distance were evaluated by both MDCT and MRI. Tegmen tympani dehiscence was evaluated by MDCT.

Results Superior semicircular canal dehiscence was detected in 14 cases (5.5%) by temporal MDCT and 15 cases (5.9%) by temporal MRI. In 13 cases (5.1%), it was detected by both MDCT and MRI. In one case (0.4%), it was detected by only temporal MDCT, and in two cases (0.8%), it was detected by only temporal MRI. Median superior semicircular canal-to-temporal distance was 0.66 mm in both males and females in temporal MDCT and temporal MRI. In both temporal MDCT and temporal MRI, as superior semicircular canal-to-temporal lobe distance increased, the presence of superior semicircular canal dehiscence in temporal MDCT and temporal MRI decreased. Tegmen tympani dehiscence was detected in eight cases (6.3%) on the right side and six cases (4.7%) on the left side. The presence of tegmen tympani dehiscence in temporal MDCT and the presence of superior semicircular dehiscence in MDCT and MRI increased.

Conclusion Superior semicircular canal dehiscence was detected by both MDCT and MRI. Due to the accuracy of the MRI method to detect superior semicircular dehiscence, we recommend using MRI instead of MDCT to diagnose superior semicircular canal dehiscence. Moreover, there is no radiation exposure from MRI.

Authors' Contributions

M.I.: planning, designing, data collecting, and surveying of literature.


N.B.M.: planning, designing, surveying of literature, statistical analyzing, and drafting the manuscript.


M.H.Ş.: planning, designing, data collecting, and surveying of literature.


N.A.: planning, designing, and surveying of literature.


G.Ş.: planning, designing, and surveying of literature.


O.K.A.: planning, designing, and surveying of literature.


Ethical Statement

This study was retrospective. Ethics committee approval was obtained from Adana City Training and Research Hospital on May 12, 2018 (No. 348).




Publication History

Received: 21 September 2019

Accepted: 06 May 2020

Publication Date:
15 July 2020 (online)

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