doctor with rectum and hemorrhoid human anatomy model at hospital, inflamed vascular structure concept

abdomen anatomical anatomy body bowel cancer clinic colon coloproctology constipation cracks diagnosis digestion digestive disease doctor erosions fissure gastrointestinal health healthcare hemorrhoid holding human inflamed internal intestinal intestine medicine model organ pain patient physician polyps prevention problem proctologist professional rectal rectum science structure surgeon surgery symptoms system tract treatment vascular