MRI
Sagittal T1
Axial FLAIR
Axial Gradient Echo
Axial T2
Axial DWI
Axial ADC
Axial T1 C+ fat sat
Coronal T1 C+
Axial T1
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.