Fig. 7
From: The craniocervical junction: embryology, anatomy, biomechanics and imaging in blunt trauma
Unilateral posterolateral rachischisis: axial CT image through the atlas (C1 vertebra) of the craniocervical junction of an 8-year-old female child involved in a road traffic accident (pedestrian versus car) who sustained head injuries with seizures. A developmental unilateral right posterolateral rachischisis is present (arrow). There were no craniocervical junction or sub-axial cervical spine fractures present