Causes of Rectal Bleeding

Celiac Disease: Loose stools, Flatulence, increased anti-transglutamine IgA, increased endomysial Abs Diverticulitis: (Sometimes Massive) rectal bleeding, Fever, most frequently Sigmoid, often in Elderly, Diarrhea/Constipation, Fistula, LLQ pain IBS: Non-inflammatory implies no fistulae, Diarrhea and Constipation, Pain Irritable Bowel Disease, contains: Ulcerative Colitis: Colon mucosal inflammation, non-transmural so no fistuae, Gross blood in stool, Continuous from the rectum proximally. Crohn's Disease: Fistulae, most frequently Ileal, Skip Lesions, Surgery usually for complications.