A case of an atlas vertebra bilaterally without costal elements of transverse processes

Abstract

An unusual atlas vertebra whose costal elements were not formed bilaterally was detected in an anatomy laboratory. Because the vertebral arteries have bony protections anteriorly by the costal elements of the transverse foramina of a usual atlas, surgical operations of the atlas’ without transverse foramina need much more attention while approaching to that region. As well as the vertebral artery, the nerve plexus around vertebral artery may also be responsible of some complications due to failure of this bony protection.

Keywords

• atlas,transverse foramen,variation,costal element

Foramen Transversarium’larında Kostal Elementleri Bilateral Olarak Bulunmayan Bir Atlas Olgusu

Abstract

Anatomi laboratuvarında kostal elementleri bilateral olarak oluşmamış sıradışı bir atlas omuru tespit edildi. Normal gelişmiş bir atlasta arteria vertebralis’lerin ön taraftan processus transversus atlantis’in kostal elementlerince korunmasından dolayı foramina transversarium’ları düzgün gelişmeyip önden açık kalan hastalara cerrahi işlem sırasında daha çok dikkatli olunmalıdır. Arteria vertebralis gibi, bu arterin etrafında seyreden sinir ağının zedelenmesi de bu bölgenin cerrahileri sonrası çıkan komplikasyonlardan sorumludur.

Keywords

• atlas,foramen transversarium,varyasyon,kostal element

References

1. Referans1 Standring S, Gray's anatomy: the anatomical basis of clinical practice. 2015: Elsevier Health Sciences. Referans2 Taitz C, H Nathan, and B Arensburg, Anatomical observations of the foramina transversaria. Journal of Neurology, Neurosurgery & Psychiatry, 1978. 41(2): p. 170-176. Referans3 Gupta C, et al, A quantitative analysis of atlas vertebrae and its abnormalities. J Morphol Sci, 2013. 30(2): p. 77-81. Referans4 El-Bary THA, M Dujovny, and JI Ausman, Microsurgical anatomy of the atlantal part of the vertebral artery. Surgical neurology, 1995. 44(4): p. 392-401. Referans5 Karau PB and P Odula, Some anatomical and morphometric observations in the transverse foramina of the atlas among Kenyans. Anatomy Journal of Africa, 2013. 2(1): p. 61-66.