HI...if u suspect chiari malformation or Tonsillar Ectopia which I feel r the same....one may be considered congenital the other acquired, but the same symptoms and issues result.
With chiari ur skull tends to be too small to contain the cerebellum....however, the TE as it can be acquired it could be from things like a LP that was drawn too fast.
many with chiari r tested for lymes, lupus, MS as many of the symptoms do overlapp, and many times we get mis dx as many drs do not feel chiari is or can cause the issues we suffer with.
I pray u find a true chiari specialist and find out if u do indeed have this condition.
Please join the chiari forum here on MedHelp for more info and support.
http://www.medhelp.org/forums/Chiari-Malformation/show/257?camp=msc&personal_page_id=862904"selma"