Hematochezia and/or melena

Low urgency

-Moderately severe

Passage of very dark (black), sticky stool with a very unpleasant odor. It resembles tar.

Associated diseases

Upper gastrointestinal bleeding - Proximal to the Treitz ligament

Crimean-Congo Hemorrhagic Fever

Colon cancer - Colorectal neoplasia

Meckel's diverticulum (Pediatrics - PEDS)

Liver cirrhosis

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