Hi,
this is another way to explain chiari malformation...basically the cerebellum back part of the brain has 2 tonsils that sit with in the skull, when the skull is malformed or if there is an outside force that forces the tonsils out of the foreman magnum they can cause a CSF blockage as well as compress the brain stem and many symptoms.
.........may I ask what symptoms does she present that the MRI was done?
Do u know if a CINE MRI was done to see if she has a CSF blockage?......
We do have a Chiari forum here on MedHelp-
http://www.medhelp.org/forums/Chiari-Malformation/show/257?camp=msc
I invite u to join us fo info, and support as we do have other care givers as well as chiarians pre and post op.
"selma"