TOPICS: Hirschsprung disease, ganglion cells, enteric nervous plexus, down syndrome, neural crest cell migration, myenteric plexus, submucosal plexus, abnormal peristalsis, empty rectum, megacolon, rectal suction biopsy, bowel resection, angiodysplasia, elderly, right colon, hematochezia, hereditary hemorrhagic telangiectasia, autosomal dominant, hematochezia, telangiectasia, epistaxis, arteriovenous malformations, ischemic colitis, atherosclerosis, splenic flexure, pain with eating, colonic diverticula, low fiber diet, constipation, old age, left sided colon, colonic wall stress, outpouching, painless hematochezia, diverticulitis, fistula, irritable bowel syndrome, abdominal pain, diarrhea, constipation, high fiber diet
