C-Spine imaged only down to C5. Anatomical alignment. No fracture/dislocation identified. No central canal or intervertebral foraminal stenosis. Hydrocephalus and low lying cerebellar tonsils within moderately enlarged foramen magnum noted. Enlarged, remodelled sella with dilated anterior the third ventricle within it. No aqueduct stenosis. Obliteration of pontine cistern and fourth ventricular outlet syndicates obstruction at the level of the fourth ventricular outlets. No associated syrinx seen.