The Split Atlas Anomaly: A Comprehensive Review

Rebecca C. Ramdhan, Jimmy J. Palakunnel, Erfanul Saker, Marielle R. Araujo, Jaspreet Johal, Marios Loukas, R. Shane Tubbs
2017 The Spine Scholar  
The "split atlas" is a rare congenital finding occurrence arising from the non-fusion of the anterior and posterior arches of the C1 vertebra. In most cases, this anomaly is asymptomatic and is discovered incidentally. However, it may be difficult to distinguish between fractures of the atlas, hence further imaging modalities are required to analyse the atypical appearance of the anterior and posterior arches of C1. Using standard search engines, the embryology, classification, clinical
more » ... n, clinical presentation, diagnosis, and treatment of the split atlas are reviewed. Clinicians who treat patients with issues near the cervical spine or interpret imaging of the craniocervical junction should be familiar with variations involving the first cervical vertebrae. Spine Scholar 1:37-44, 2017.
doi:10.26632/ss.6.2017.1.1 fatcat:olgbbcpnczepdbmnoe6gizou34