X-ray skull showed multiple wormian bones, widened sutures and patent anterior fontanel and occipitalization
of C1 vertebrae [Figure 3].
If too much material is included in the base of the skull, occipitalization
of the atlas will result.
Cervical vertebral fusions occur in 20 to 35% of cases, whereas platybasia and occipitalization
of the atlas are found in about 30% (6).
For instance, one study showed that 4 out of 5 cases who had occipitalization of the atlas also had an atypical pathway of the VA as it enters the cranium.
The intracranial entrance of the atlantal segment of the vertebral artery in crania with occipitalization of the atlas.
INTRODUCTION: Occipitalization of the atlas is defined as congenital bony fusion of the atlas vertebra to the base of the occipital bone of the skull.
DISCUSSION: Occipitalization of atlas results due of failure of segmentation and separation of the most caudal occipital sclerotome and the first cervical sclerotome during the first few weeks of fetal life.
Neurological symptoms associated with occipitalization of the atlas are attributed to the ligamentous laxity of the transverse ligament about the odontoid process caused by repeated flexion and extension of the neck leading to the compression of the spinal cord or actual indentation of the medulla oblongata.
4) In our study, we observed two cases of C2-C3 fusion with no association of occipitalization
2003) have reported two cases of occipitalization with spina bifida of atlas.
According to McRae & Barnon (1953), patients with occipitalization of the atlas may have the following physical features like low hairline, torticollis, restricted neck movements and / or abnormal short neck.
Occipitalization of the atlas: its occurrence and embryological basis.