Flow-voids in the major vessels in the base of the brain appear grossly patent.low cerebellar tonsils about 5 mm below the foramag?

Not Abnormal: Cerebellar tonsils at 5 mm below foramen magnum is a normal variant and would not be expected to have clinical significance. Flow voids mean that blood is indeed flowing in your vessels, a good thing.

Response: You likely have a low grade Chiari malformation which is likely asymptomatic, but not clear as to what question you wish answered. Please repose and be specific.