Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Computed tomography images of the cervical spine. (A) Complete absence of the posterior arch of the atlas with an anterior cleft was observed. (B) The sagittal plane of the three-dimensional computed tomography scan shows the os odontoideum.
