Apparently not according to my GI....who I place high on the list of "knowing what's going on in the world of IBD".
I would say misdiagnosis by doctors (where it's CD and not UC) and misunderstanding the terms by patients.
Sorry Q but your GI is incorrect, there is a 2-5% chance on one patient having both crohn's and UC...(as stated in the "ask the doctor" from the CCFC journal summer of 2005)
Major differences between UC and crohn's is that the inflammation from UC is surfacable only, with CD it can go beneith the many layers of the intestinal lining, also with CD there are usually skipped patterns of inflammation with healthy tissue in between, with UC the entire area will be inflammed...
It's a small percentage but one patient can infact have both conditions since they are still considered seperate entities because of the above mentioned differences (also because UC is limited to the colon/rectom and CD can affect the entire GI tract from mouth to anus, both conditions can be tagged with extraintestinal manifestations.