54 years, Female, Parkinson's. Limited sequences of the brain were obtained for operative planning which are motion degraded. No abnormal enhancement, vascular lesions, or masses are appreciated along the expected trajectory of the DBS leads. Arachnoid cyst at the right cerebellomedullary junction is again seen and similar to prior with minimal local mass effect. There is no suspicious intracranial mass or significant mass effect. No midline shift or herniation. Ventricles and sulci are within normal limits for age. Low-lying cerebellar tonsils are again seen. No evidence of hemorrhage, abnormal mineralization, or gross signal abnormality in the basal ganglia or brainstem is evident.
1. Examination for operative planning pre-DBS placement is motion degraded.2. No focal lesions along the expected trajectory of the DBS leads. Incidental findings include a small arachnoid cyst centered at the right cerebellomedullary junction which appears similar to 5/3/2010.