Infant in motor vehicle accident with neck pain

CT of atlanto axial rotatory subluxation
Axial CT without contrast of the cervical spine obtained after the accident shows C1 vertebral body rotated 45 degrees to the right (upper left) on the C2 vertebral body (lower left). Axial CT without contrast of the cervical spine obtained 1 day later shows C1 vertebral body now normally aligned (upper right) with the C2 vertebral body (lower right)

The diagnosis was atlanto axial rotatory subluxation that resolved in a day