Metastatic melanoma with a right frontal lesion treated with SRS. There is interval decrease in size of the right frontal lobe lesion, which now measures up to 7 mm, previously 14 mm, and contains susceptibility effect and intrinsic T1 signal. There is minimal residual surrounding T1 hyperintensity. There are unchanged punctate nonspecific foci of susceptibility effect in the right medial temporal lobe and right parietal deep white matter without associated enhancement. There is no evidence of acute infarct. The ventricles and basal cisterns are unchanged in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. The skull and scalp soft tissues are grossly unremarkable. There is gas in the left globe that likely represents pneumatic retinopexy. There is a right lens implant. There are postoperative findings in the right retromaxillary region with patchy enhancement in the right pterygopalatine fossa. There is mild scattered paranasal sinus mucosal thickening and scattered fluid signal in the bilateral mastoid air cells.
1. Interval decrease in size of the treated right frontal lobe presumed metastasis.2. Postoperative findings in the right retromaxillary region with nonspecific patchy enhancement in the right pterygopalatine fossa.