Re: Chron's or no Chron's
There are some immunological markers for Crohn's which can be tested for in the blood: these are ASCA IgA, ASCA IgG, and pANCA.
If you test positive for ASCA IgA and ASCA IgG, then you most likely have Crohn's. pANCA is more common in colitis and Crohn's of the colon.
Take a look at this article here: http://cme.medscape.com/viewarticle/540595
I have Crohn's myself and tested positive for ASCA IgA and ASCA IgG, and negative for pANCA. This is consistent with the type of disease I have - restricted to the ileum.
Hope that helps,