I'm not sure how to introduce myself, just curious about the following. Can anyone tell me how effective blood and stool tests are at detecting inflammatory bowel disease? I had these and they came back normal but because of my symptoms I had a CT with contrast dye. I expected it to come back normal but I had a call from a Macmillan Cancer Nurse to explain that it had showed thickening of the bowel walls around the cecum and bloating and that I need an urgent colonoscopy. Other than cancer the likely causes of the thickening are inflammatory bowel diseases, however do the other normal test results make this unlikely?