so the protrusion of the right cerebellar tonsil in my brain is only 3mm going into the foraman Magnum. They say it is not Chiari 100%. Is it possible to still have Chiari or do I have to take what they are saying as true? I have not yet had a cine mri. Surely a headache, neck ache and all the usual Chirai symptoms surely has something to do with the protrusion?