Eur Spine J (2018) 27:1272–1277 https://doi.org/10.1007/s00586-017-5372-4 ORIGINAL ARTICLE Retrotransverse foramen of the atlas: prevalence and bony variations 1 2 3 Juan A. Sanchis‑Gimeno · Esther Blanco‑Perez · Marcelino Perez‑Bermejo · 1 4 Susanna Llido · Shahed Nalla Received: 5 June 2017 / Revised: 6 October 2017 / Accepted: 29 October 2017 / Published online: 7 November 2017 © Springer-Verlag GmbH Germany 2017 Abstract bony characteristics which presented an unexpected spicula Purpose To analyze the prevalence of the retrotransverse in the left RTF. foramen (RTF) and its bony variations. Conclusions The RTF is a nonmetric variant of the atlas Methods One hundred ten atlases of living adult subjects, vertebra that can present non-degenerative and non-trau- 161 twentieth century dry adult cervical atlases and four dry matic spiculae or it can be unclosed. In addition, it can adult cervical atlases from medieval skeletons were studied be associated with the presence of unclosed transverse to detect the RTF and its abnormal bony variations. The foramina. 110 living adult subjects underwent a computed tomography study to detect the RTF. Keywords Atlas · Bony variations · Cervical spine · Results In the in vivo sample (n = 110; 100%), the RTF Nonmetric variant · Retrotransverse foramen was found in four (3.6%) atlases. It was bilateral in all cases, but
European Spine Journal – Springer Journals
Published: Nov 7, 2017
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