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Mass with cystic areas fills and dilates the third ventricle including the foramen of Monro, insinuates itself around the terminal portions of the ICAs and basilar artery, fills and widens the sella turcica, and fills the interpeduncular and prepontine cisterns. The solid portion of the mass enhances intensively post-contrast.
The lateral ventricles are dilated, VP shunt placed as described on CT study.