Severe positional headaches with visual disturbances and vomiting. Chiari suggested on outside MRI dated 2/15. MRI BRAIN: There is no evidence of acute intracranial hemorrhage, mass, or acute infarct. The cerebellar tonsils are low-lying, measuring approximately 4 mm below the level of the foramen magnum. The brain parenchyma appears otherwise unremarkable. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. The skull and extracranial soft tissues are unremarkable. MRV BRAIN: There is diminished signal and associated T2/FLAIR signal abnormality involving the left transverse sinus highly suspicious for thrombosis. The left internal jugular vein also appears to be thrombosed. The remainder of the venous sinuses appear patent.
1. MR venogram without contrast is suboptimal but demonstrates findings highly suspicious for thrombosis involving the left transverse sinus and the left internal jugular vein. Remainder of the dural venous sinuses appear patent. No evidence of parenchymal edema or hemorrhage.2. Low-lying cerebellar tonsils without clear evidence of Chiari malformation. I personally reviewed the Images and/or procedure with the Resident/Fellow and agree with this report.