Evidence of prior right occipital craniotomy and stable appearance of multilobulated T1 hyperintense T2 hypointense non-enhancing pre-pontomedullary extra-axial lesion. The lesion lies centrally and to the right of the pre pontine and perimedullary cistern insinuating around the contour of the pons and the medulla displacing the basilar artery anteriorly with minor associated vessel narrowing. No significant mass effect on the adjacent brainstem. Patchy diffusion restriction. No contrast enhancement.