Metastatic melanoma with known brain metastasis treated with stereotactic RT. There is interval decrease in size of the left occipital lobe lesion, which now measures up to 10 mm, previously 19 mm. The lesion now contains intrinsic T1 hyperintensity and susceptibility effect, compatible with subacute blood products. There is no significant residual surrounding vasogenic edema or evidence of new intracranial tumors. 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 orbits are grossly unremarkable.
Interval decrease in size of the left occipital lobe metastasis containing subacute blood products, as well as interval resolution of the associated vasogenic edema.