New onset tremor and bradykinesia: history of head injury. There is paucity of high SWI signal within bilateral substantia nigra nigrosome-1. There is mildly reduced T2 signal in the bilateral putamen and globi pallidi along with susceptibility effect, suggestive of mineral deposition. There is no evidence of intracranial hemorrhage, mass, or acute infarct. The brain parenchyma otherwise appears unremarkable. There is no abnormal intracranial enhancement. The ventricles and basal cisterns are normal 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 retention cyst formation in the left maxillary sinus.
Findings indicative of Parkinson disease. Otherwise, no evidence of intracranial hemorrhage, mass, or acute infarct. 