Related Questions

What does it mean when my MRI results say that my cerebellar tonsils are seen low lying 4.2mm below, suggesting chiari malformation?

Chiari malformation. What you're describing is a typical finding for a chiari type 1 malformation. Chiari malformation is basically when part of the brain (cerebellum) sits below the base of the skull. This may cause headaches, weakness, trouble swallowing/speaking, numbness of the arms....Many different symptoms are possible. It also can be asymptomatic. Get a neurological or neurosurgical evaluation. Read more...
Inconsequential. Why did you get an MRI? Having symptoms? Normal tonsils can descend up to 5-6 mm. In most cases, it is more the appearance crowding at foramen magnum (opening at the base of the skull; the tonsils in ur case pass 4.2 mm below this) than the actual #. Error in this measurement as well, so to say 4.2 mm is a bit disingenuous as the measurement is not that accurate. This is a very common situation. Read more...

Is it possible to have "slightly low lying cerebellar tonsils" without it being chiari malformation? That was a finding on MRI but doc says no chiari

Yes, I suppose so. Chiari malformations have specific findings. "Slightly low lying cerebellar tonsils" is a somewhat nebulous, nonspecific subjective description. It probably means that the tonsillar tip is below the foramen magnum but within the range of normal variation, but if you are concerned, talk to your doc about it. Read more...