Enlargement of the cochlear aqueduct: does it exist?

European Archives of Oto-rhino-laryngology : Official Journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : Affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery
Herbert Stimmer

Abstract

Our intention was to evaluate whether enlargement of the cochlear aqueduct could play a role in dysfunctions of the inner ear. There is little literature dealing with the question of cochlear aqueduct (CA) enlargement and results of reported radiological examinations are contradictory. Therefore, we decided to analyse 400 high-resolution CT-scans of the temporal bone to examine the diameter of the CA. We used scan-data from a 64-line multislice spiral-CT-scanner stored in our PACS-System. CA-enlargement was defined as a diameter of more than 1 mm in the whole otic capsule portion. A classification with four types of CA's proposed by Migirov and Kronenberg in 2005 was applied. Statistical analysis of diameters, different CA-types and side asymmetry was performed. We did not find any CA exceeding 1 mm in diameter in the otic capsule portion, there is no evidence of CA-enlargement, not even in patients with inner ear malformation. A new aspect compared with published literature to date is that nearly in all cases CA was identified, but in different degrees. According to our findings, it seems to be very unlikely that CA-enlargement is a reason for pathologic inner ear condition as it is in case of large vestibular aqueduct.

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Citations

Jul 16, 2014·European Archives of Oto-rhino-laryngology : Official Journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : Affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery·Jonas J-H ParkMartin Westhofen
May 29, 2013·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Hyo Seok ParkJin Seo Park
Jul 28, 2019·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Yona VaisbuchPeter L Santa Maria
Apr 24, 2018·Surgical and Radiologic Anatomy : SRA·Zhenghua LiAnzhou Tang
Sep 25, 2020·Cochlear Implants International·C Xie, R Harris
Oct 13, 2020·Frontiers in Neurology·Brooke SarnaHamid R Djalilian
Dec 5, 2020·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Giulia MolinariLukas Anschuetz
Oct 29, 2020·Surgical and Radiologic Anatomy : SRA·Bulent SatarSalih Cengiz Meral

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