 There is redemonstration of postoperative changes from prior left posterior temporal parietal lobe mass resection. The resection cavity appears similar in configuration, with marginal susceptibility likely relating to chronic postoperative hemosiderin deposition. There is no associated pathological enhancement. T2/FLAIR hyperintensity surrounding the posterior and medial margins of the resection cavity is again noted, with similar appearance to more recent comparisons, although slightly more posteriorly extending compared back to the June 2013 exam. There is again mild ex vacuo dilatation of the left ventricular trigone.There is redemonstration of numerous punctate foci of susceptibility throughout the cerebral hemispheres especially posteriorly and along the brainstem margins, with slight interval progression. These are are nonspecific but favored to represent posttreatment changes.Ventricles and sulci are prominent, consistent with moderate global volume loss. There is no midline shift or mass effect. There is no diffusion abnormality. No extra-axial fluid collection is identified. Normal flow-voids are demonstrated in the major intracranial vascular structures. The midline structures and craniocervical junction are within normal limits. The right cerebellar tonsil is slightly more low lying than the left.
Stable postoperative and posttreatment changes without evidence of recurrent tumor. Slight posterior progression of marginal FLAIR hyperintensity when compared to remote exams which may relate to evolving posttreatment changes.