Thanks.
The Doc has confirmed that the case was unique. There's no herniation of the cerebral tonsil but she displayed all the symptoms of Chiari. Headache, backpain(syringomyelia) etc. Her "neck area" was found to be congested "small" impeding the flow of the CSF. Not sure if you can termed it as acquired Chiari. It was not conculsive that she has Chiari but however she just had the same procedure done - a posterior fossa decompression on 31st Aug 2012. Hope things worked out.
Hi and welcome to the Chiari forum.
It all depends on if u have congenital Chiari or acquired Chiari....congenital u would have a malformed skull which leads to the cerebral tonsils to herniate and block CSF causing the hydro.
If u have acquired chiari ur skull would be of normal shape and size and ur body would be over producing CSF or just not absorbing it correctly causing pressure that forces the cerebral tonsils to herniate...so not a true chiari, but the same symptoms....
Hope that helps