J Korean Neurosurg Soc.  2006 Jul;40(1):44-46.

Combined Congenital Anterior and Posterior Midline Cleft of the Atlas Associated with Asymptomatic Lateral Atlantoaxial Subluxation

• Park SY
• Kang DH
• Lee CH
• Hwang SH

Abstract

Although congenital anomalies of the atlas have been well-documented, atlas anomalies of clefts and aplasia are rare. Anterior and posterior midline clefts of the atlas have been reported separately in some series. However, combined congenital anterior and posterior midline clefts of the atlas are reported rarely. Hence, we report a very rare case of combined congenital anterior and posterior midline clefts of the atlas associated with asymptomatic lateral atlantoaxial subluxation.

Keyword

Congenital anomaly; Midline cleft; Atlas