Marked supratentorial ventricular dilatation with no evidence of transependymal CSF permeation, associated with narrowed mamillopontine distance about 6 mm, consistent with compensated marked hydrocephalus.
Marked funneling of the proximal aqueduct with tight stenosis of its lower end. The 4th ventricle is not dilated, reflecting marked aqueduct stenosis.
Ultra-thin 3D sagittal T2 weighted images show marked aqueduct stenosis by adhesions/web.
Mild vertebrobasilar dolecho-ectasia identified.
Incidental bilateral maxillary sinusitis.