Clinical shunt: Primary CNS lymphoma, status post therapy. Signs and symptoms: Restaging, please compare to last MRI. Pre-and post-enhanced brain MRI:Negative diffusion weighted images.Examination demonstrate a stable extensive posttreatment changes of the left frontal lobe with regions of encephalomalacia and mild expansion of left frontal horn similar to prior exam. Mild thickening changes of right anterior frontal lobe is also noted which as well remains stable since prior MRI exam from 11 -- 3 -- 14. On the post enhanced images there is no detectable abnormal enhancement to suggest residual and or corners of tumor. This is a similar observation as prior study and without change.Slight prominence of cortical sulci similar to prior exam is again noted. Ventricular system remain slightly prominent and with maintained midline similar to prior study.Multiple a small patchy foci of flair hyperintensity in the periventricular and subcortical white matter of bilateral cerebral hemispheres remain fairly similar to prior exam and considering patient's stated age likely representing chronic small vessel ischemic strokes. Possibility of some overlapping posttreatment changes cannot be entirely excluded.Calvarium demonstrate post op changes and unremarkable otherwise.Unremarkable images through the orbits in including axial fat sat post enhanced series.
Stable post treatment changes of bilateral frontal lobes (left greater than right) and without evidence of residual or corners of disease. 