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Altered marrow signal (hyperintense onT2W and hypointense on T1W images) is seen C1 and C2 vertebrae with erosion of cortex. There is apprximately 15 mm cranial migration of dens and is compressing medulla causing white matter edema. There is right side rotation of upper cervical spine. Transverse ligament, atalnto-occipital ligament, and antlanto-axial ligaments are obscured, possible ruptured.
Extensive soft tissue thickening is seen in pre and paravertebral spaces at 1st and 2nd levels.
Incidentally T1 hyperintense 'V' or crescent shaped fluid collection is noted in the subretinal space.This is diagnostic of blood.The apex of the V is attached to the optic disc and the limbs are attached anteriorly to the ora serrata.