On the lateral cervical spine radiographs of a 60-year-old woman complaining of neck pain, diffuse hyperostosis or calcification was present anterior to the anterior arch of the atlas. CT of atlas revealed it to be bipartite and the hyperostosis to be due to hypertrophy of its anterior arch. We report this as a new sign associated with a bipartite atlas.
ChildersJ. C.WilsonE. G.: Bipartite atlas. Review of the literature and report of a case. J. Bone Joint Surg. (Am)53-A (1971), 578.
2.
GehweilerG. A.JrDaffnerR. H.RobertsL.Jr: Malformations of the atlas vertebra simulating the Jefferson fracture. AJR140 (1983), 1083.
3.
HoltR. G.HelmsC. A.MunkP. L.GillespieT.III: Hypertrophy of C-1 anterior arch. Useful sign to distinguish os odontoideum from acute dens fracture. Radiology173 (1989), 207.
4.
SaifuddinA.RenwickI. G.: Case of the month. A pain in the neck. Br. J. Radiol.66 (1993), 379.
