Posted 1/11/2012 8:53 AM (GMT -6)
The biopsies can detect inflammation, ulcers, disease, scarring of the area biopsied, etc. This can tell them possible or likely causes such as Crohn's disease, ulcerative colitis, cancer, etc.
Unless the entire colon shows absolutely no signs of any abnormalities biopsies are almost always taken at any areas of inflammation or abnormality.
The CT enteropgraphy provides a "look" at the small intestine which the colonoscopy has no hope of reaching (we have some 20 feet of small intestine). Thickening of the intestinal wall, scarring and/or inflammation to some degree, narrowing of the intestine, etc. are some of the things that can show up via the scan.