The influence of the subarcuate artery in the superior semicircular canal dehiscence and its frequency on stillbirths: illustrative cases and systematic review

Literature describes that on the 25th gestational week the labyrinth is fully formed and with adult size. However, recent studies have shown that the cranial and labyrinth development continues until 3 years of age. Objectives: To demonstrate through tomographic study the frequency of semicircular c...

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Published inActa oto-laryngologica Vol. 138; no. 5; pp. 437 - 442
Main Authors Bom Braga, Gabriela Pereira, Noble, Jack H., Gebrim, Eloisa Maria Mello Santiago, Labadie, Robert F., Bento, Ricardo Ferreira
Format Journal Article
LanguageEnglish
Published England Taylor & Francis 04.05.2018
Subjects
Arteries - embryology
Humans
Retrospective Studies
Semicircular canal
Semicircular Canals - abnormalities
Semicircular Canals - blood supply
Semicircular Canals - diagnostic imaging
Stillbirth
subarcuate artery
superior semicircular canal dehiscence
Temporal Bone - diagnostic imaging
tinnitus
Tomography, X-Ray Computed
vertigo
subarcuate artery
tinnitus
vertigo
Semicircular canal
superior semicircular canal dehiscence
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Summary:Literature describes that on the 25th gestational week the labyrinth is fully formed and with adult size. However, recent studies have shown that the cranial and labyrinth development continues until 3 years of age. Objectives: To demonstrate through tomographic study the frequency of semicircular canal dehiscence on nine specimens of stillbirths between 32 and 40 weeks and, through literature review, present another possible etiology for its cause. Methods: Tomographic study of the temporal bone of 9 specimens of stillbirths between 32 and 40 weeks. Results: A frequency of 88.89% of alterations were found in our study, with 44% presenting bilateral alterations and 44% unilateral alteration; 11.11% had no dehiscence. Conclusion: The tomographic study showed superior semicircular canal dehiscence (SSCD) in 88% of the specimens studied, protrusion of the superior semicircular canal (SSC) in all fetuses, and an enlarged SSC that may be caused by the expansion process provoked by the subarcuate artery entering the subarcuate canaliculus, leading to SSCD.
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ISSN:0001-6489
1651-2251
DOI:10.1080/00016489.2017.1416169