Hi, 45 yrs old recently diagnosed with crohns. Taking asacol. Dr did not find anything on my colonoscopy it was a blood test through Promethesus lab in california. It said I had 57 % of the antibodies that is in a person with crohns. Has anyone else only been diagnosed by a blood test? The asacol works for the most part. I only go 1-2 times a day. I am starting this week with passing the pill undigetsed and have been loose in the bathroom since??? Anyways just frustrated. I am fortunate not to have alot of pain associated with this. Is there a second opinion for a blood test???