Post contrast images showed intense enhancement of the lesion with well defined border which compressed the aqueducts of sylvius resulting in significant dilatation of third and lateral ventricles.
Marked dilatation of third and lateral ventricles are noted due to compression of the aqueduct associated supratentorial brain parenchymal thinning.
The lesion is showing communication with venous sinus.
Carotid arteries and its branches as well as the vertebrobasilar circulation appear normal.