Hi Blackbird, welcome! Yes, as others have said, I am diagnosed with Behcets. I was just diagnosed a month and a half ago after chest pains put me in the hospital. If you want to read my entire story from IBS to Behcets it is in this thread:
http://www.crohnsforum.com/showthread.php?t=44354
Here is the thing about Behcet's....there is no test for it. The criteria for being diagnosed with Behcets is oral and genital ulcers (more than three a year), skin involvement (ulcers/rashes), and ruling out similar diseases like Crohns and lupus.
http://www.behcets.com/site/pp.asp?c=bhJIJSOCJrH&b=260549
There is a gene they have found in human DNA that can signify Behcets, but it isn't completely accurate.
When you were diagnosed with Crohn colitis, they diagnosed via a biopsy right? The biopsy would not be the same if it was Behcets, it would be negative for crohns.
The good news is, if you somehow did have Behcets on top of crohns, you will be taking the same meds for both. Both are autoimmune, both effect the digestive tract.
Behcets is a nasty beast though....right now mine is attacking the blood vessels in my joints, intestines, eyes, skin, and even my heart.

I'm on pred but they put me on way too low of a dose. Yuck!
I hope you get some solid answers soon! Feel free to ask me anything else that might come to mind.
