ABSENT POSTERIOR ARCH OF THE ATLAS
- 1 June 1973
- journal article
- Published by American Roentgen Ray Society in American Journal of Roentgenology
- Vol. 118 (2) , 431-434
- https://doi.org/10.2214/ajr.118.2.431
Abstract
Four examples of an absent posterior arch of the atlas are described. Most patients with this anomaly have a small ossification posteriorly. An abnormal location of the chondrification center, with subsequent hypoplastic cartilaginous development of the arch is postulated as the likely cause. When this is an isolated anomaly, it is usually unassociated with neurologic abnormalities.Keywords
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