Basilar Invagination

  • Etiology: congenital
  • Imaging: odontoid process > 3mm above Chamberlain’s line (line drawn between hard palate + opisthion), ventral compression of cervicomedullary junction

Radiology Cases of Basilar Invagination

CT of basilar invagination
Sagittal CT without contrast of the cervical spine shows the tip of the dens is 6 mm above Chamberlain’s line.