 Postoperative changes from small left prior burr hole are seen, with rounded area of peripheral susceptibility likely relating to previous biopsy. There is redemonstration of a stable area of T2/FLAIR hyperintensity involving the left superior frontal gyrus with mild associated cortical thickening anteriorly, with signal abnormality extending into the left frontal centrum semiovale and periventricular white matter. There is a prominent area of central cystic degeneration. Anterior to the cystic area within the thickened cortex there is a small area of enhancement which appears slightly increased from prior examination (series 1302, image 152-155) especially the medial component. The ventricles are nondilated. The cisterns remain patent. There is no midline shift or mass effect. Normal flow-voids are demonstrated in the major intracranial vascular structures. Enhancement and osseous thickening along the medial right orbital roof is again noted, possibly representing an area of fibrous dysplasia. There is a left maxillary sinus retention cyst.
There is slight increased foci of enhancement along the anteromedial margin of the cystic area of degeneration in the left frontal lobe suspicious for tumor progression.