types of ulcerative colitis

anatomy appendix bowel cancer chronic colitis colon colonoscopy colorectal crohn crohns diagnosis diarrhea digestion digestive disease extensive gastrointestinal health healthcare human illustration inflammation inflammatory intestinal intestine large left medical medicine megacolon organ pain pan pancolitis proctitis proctosigmoiditis rectum science segment side sigmoid surgery syndrome system total toxic tract type ulcer ulcerative urgent