Transient vision loss. MRI Brain: There is no evidence of intracranial hemorrhage, mass, or acute infarct. There is a right cerebellar hemisphere developmental venous anomaly. The brain parenchyma otherwise appears unremarkable. 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 paranasal sinuses are grossly unremarkable. There is a well-circumscribed mass in the right parotid gland that measures up to 18 mm.MRA Brain: There is apparent focal stenosis of the left vertebral artery just distal to the origin of the left PICA. The right vertebral artery is diffusely hypoplastic. Otherwise, there is no evidence of significant other cerebral steno-occlusive lesions or aneurysms.MRA Neck: The right vertebral artery is diffusely hypoplastic. Otherwise, there is no evidence of significant steno-occlusive lesions.
1.No evidence of acute intracranial hemorrhage or infarct.2.Apparent focal stenosis of the left vertebral artery just distal to the origin of the left PICA. The remaining major intracranial and cervical vessels are patent without aneurysm or significant stenosis.3.A well-circumscribed mass in the right parotid gland may represent a benign mixed tumor, but is incompletely characterized.I personally reviewed the Images and/or procedure with the Resident/Fellow and agree with this report.