Affirmative Action doctors?? Or, they just weren't trying very hard??
Some Crohn's cases might be easy, but finding granulomas isn't. Once the trouble area get sufficiently large so it can be seen during a colonoscopy, it's an easy decision. But those visible lesions don't always appear early.
Finding the odd granuloma in a blood test or tissue scraping is not easy. They just aren't that prevalent. It took the docs 8 years to find the granulomas that gave me the sarcoid diagnosis.
And if the granuloma was found in the blood stream, I wonder how they distinguished between Crohn's and Sarcoidosis?