Intermittent bilateral vision loss. Orbit MRI: The globes and ocular adnexa are intact bilaterally. There is no evidence of orbital mass lesions or abnormal enhancement. Brain MRI: There is no evidence of intracranial hemorrhage, mass, or acute infarct. The brain parenchyma and pituitary gland appear 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 a small amount of fluid within the right mastoid air cells. There are subcentimeter retention cysts in the maxillary sinuses. Brain MRA: There is no evidence of significant steno-occlusive lesions or cerebral aneurysms. There is a right fetal posterior cerebral artery, which is an anatomic variant.Neck MRA: There is no evidence of significant steno-occlusive lesions.
1. Unremarkable orbits.2. No evidence of acute intracranial hemorrhage, mass, or acute infarction.3. No evidence of significant cerebrovascular steno-occlusive lesions, although the sensitivity for small vessel vasculitis on MRA is relatively low.