T1 axials post-gad

Findings: Mostly non-enhancing mass in the pontine tegmentum (a) and 4th ventricle (b). The residual 4th ventricle (4v) is posterior. Petrous (pet ica), pre-cavernous (pc ica) and cavernous (cav ica) internal carotid artery. Meckels cave (mec). Sigmoid sinus (sig). Transverse sinus (ts).