Melanoma of skin. Status post craniotomy for tumor resection. There are post-operative findings related to a right frontal craniotomy for tumor resection with mild rim enhancement of the surgical cavity. There are small foci of pneumocephalus, dural thickening and enhancement and a fluid collection subjacent to the craniotomy flap measuring 9 x 30 mm. There is unchanged mass effect on the right frontal horn with mild midline shift towards the left. There is evidence of a remote left frontal craniotomy with redemonstration of a resection cavity at the left frontal lobe convexity, which appears unchanged. There is T2 signal abnormality in the right frontal lobe as well as around the left frontal resection cavity, which is unchanged. There are additional scattered punctate foci of abnormal T2 hyperintensity within the periventricular and subcortical white matter, which are non-specific. There is minimal amount of restricted diffusion in the right frontal lobe resection cavity inferiorly. There is restricted diffusion in the right precuneus, which corresponds to a lesion with intrinsic T1 shortening and susceptibility artifact. There are multiple areas of susceptibility artifact throughout the bilateral cerebral hemispheres and right cerebellum, consistent with hemosiderin deposition. There is soft tissue swelling of the scalp, predominantly of the right side.
1. Expected post-operative findings related to a right frontal craniotomy for tumor resection with minimal enhancement surrounding the resection cavity margin. This study can serve as a baseline study.2. No significant interval change in the appearance of the right parietal precuneus hemorrhagic lesion as well as left posterior frontal resection cavity.  