Fig 2. A 21-year-old man with chronic renal insufficiency who underwent gadolinium-enhanced MRA of the abdomen followed by MR imaging of the brain 6 days later to rule out causes of syncope. A, Normal findings on abdominal MRA. B, Precontrast FLAIR image shows diffuse increased signal intensity in the SAS 6 days after the gadolinium injection. The patient had an emergent lumbar puncture, which was as negative for subarachnoid hemorrhage, infection, or malignant cells.