Brain metastasis: left sided weakness. Many of the images are degraded by patient motion. There is interval development of extensive vasogenic edema in the right basal ganglia, insula, and frontal lobe surrounding a mass in the right basal ganglia that measures up to 25 mm. The mass displays susceptibility effect and high T1 signal as well as peripheral enhancement. There is partial effacement of the right lateral and third ventricle, while the left lateral ventricle may be slightly dilated. There is also an unchanged subcentimeter focus of susceptibility effect more posteriorly in the right basal ganglia. There is an unchanged area of susceptibility effect without enhancement in the right cerebellar hemisphere that measures up to approximately 15 mm. There is no evidence of acute infarct. There is 10 mm of midline shift to the left. The major cerebral flow voids are intact. The orbits, skull, paranasal sinuses, and scalp soft tissues are grossly unremarkable.
1. Interval development of extensive vasogenic edema in the right basal ganglia, insula, and frontal lobe surrounding a metastasis with subacute hemorrhage in the right basal ganglia and resultant 10 mm of midline shift.2. Unchanged hemorraghic lesions in the posterior right basal ganglia and right cerebellar hemisphere.