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differential

A case report of a congenital cleft of the anterior atlas arch: a rare variant of the atlas mimicking fracture

July 08, 2014

Congenital anterior midline clefts of the atlas are rare developmental anomalies with only a few reported cases in the literature. This normal variant of the atlas results when the anterior arch fails to fuse during the ossification process. Series of cadaveric dissections have demonstrated anterior midline atlas clefts in 0.1 -0.2% of the general population.

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