Diseases of the Colon, Rectum, and Anal Canal

acid activity adenomas anal antibodies antigen appear areas associated bacterial bile acids biopsy blood carcinoma cause cecum cells changes chronic Clin clinical coli colon cancer colonoscopic colorectal cancer common contain contrast Crohn's disease decreased demonstrated detected diagnosis diarrhea diet dietary dysplasia effect endoscopic evidence examination factors familial fecal fiber Figure findings flora function Gastroenterology gastrointestinal human immune important incidence increased indicated infection inflammatory bowel disease intestinal involved isolated large bowel large intestine lesions less levels lower major malignant mechanisms mucin mucosa mucus normal observed occur organisms patients polyposis polyps population present produce rates rats rectal rectum reported response risk role secretion seen severe significant similar specific stool structure studies suggested symptoms syndrome therapy tion tissue tract treatment tumor ulcerative colitis usually wall