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🌱 來自: gastrointestinal bleeding

lower gastrointestinal bleeding

(NEJM 2017;376:1054) 詳見Acute Lower Gastrointestinal Bleeding.

diverticular bleed (30%)

Polyp/Tumor (20%)

• Typically slow ooze, p/w fatigue, weight loss, iron deficiency, anemia

Colitis (20%)

• Infectious (see “Acute Diarrhea”), IBD, ischemic colitis, XRT

Anorectal disorders (20%)

• Internal, external hemorrhoids
• anal fissures, rectal ulcers,
• rectal varices (Rx by ↓ portal venous pressure in cirrhosis), XRT

Vascular (<10%)

• Angioectasia & AVMs.
• Hereditary hemorrhagic telangiectasia (Weber-Osler-Rendu):

Meckel’s diverticulum