As they say it is hereditary, I have it...no one else in the family has ever been diagnosed with it...Even though in my heart of hearts I swear my father had either IBS or CD, but never was diagnosed...anyways, my son a few years back was having every symptom that goes along with CD, his doctor got us into a peds GI and they did a colonoscopy to see...thank the good Lord he does not have it, but I do believe they need to have some type of symptoms before they start with testings for it.