Metastatic melanoma. There is an enhancing T2 hyperintense 8 mm diameter lesion in the left hippocampus. There are also nonspecific mild scattered foci of cerebral white matter T2 hyperintensity. There is no evidence of other intracranial lesions. 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 orbits, skull, and scalp soft tissues are grossly unremarkable. There is fluid or mucosal thickening in the bilateral ethmoid sinuses.
A subcentimeter lesion in the left hippocampus likely represents metastatic disease. 