Lower GI Bleed - Differential Diagnosis Algorithm



 • Structural: Diverticulosis, Hemorrhoids, Post-polypectomy, Polyps & malignancy, Anal fissure, Aortoenteric fistula, Colonic and rectal ulcer, Meckel's diverticulum

 • Vascular: Acquired/sporadic (angiodysplasia, colonic/rectal varices), Congenital/systemic (CREST, HHT), Tumors (hemangiomas, Kaposi sarcoma)

 • Inflammatory: Ischemic colitis, IBO, Infectious colitis, Radiation colitis/proctitis



Matthew Ho, MD PhD @MatthewHoMD



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