 Brain MRI:The left AICA is visualized coursing in close proximity to and may be in contact with the cisternal portion of the left facial nerve but evaluation is limited by motion. The left AICA does not appear to enter the left porus acusticus. There is no gross evidence of a mass or abnormal enhancement of the visualized cranial nerves, including the trigeminal or facial nerves.The ventricles and sulci are normal in size. There are no mass effect or midline shift. No DWI abnormalities are identified. There are no extraaxial fluid collections. Scattered mild periventricular and subcortical T2/FLAIR hyperintensities are noted likely from the sequelae of mild chronic small vessel ischemic disease.Brain MRA:There is antegrade flow within the distal bilateral vertebral arteries, the basilar artery, distal bilateral internal carotid arteries and carotid siphons and bilateral anterior, middle and posterior cerebral arteries. Note is made of a normal variant dominant left vertebral artery, Hypoplastic right ACA, small right PComA and nonvisualized left PComA. No arterial stenoses, occlusions or aneurysms are identified.
The left AICA incidentally courses in close proximity to and may contact the cisternal portion of the left facial nerve but full evaluation is limited by motion. No mass or abnormal enhancement is noted along the trigeminal or facial nerve distribution, within significant limitations of patient motion. Unremarkable MRA head.