Melena: What Is It, Causes, Symptoms, Bleeding, Treatment, and More Osmosis Hematochezia vs. melena: What's the difference? UT MD Anderson Stool (Poop) Color: Guide, What It Indicates, Healthy Color MALENA: Melena is the medical term for black, tarry stools caused by the presence of digested blood. It typically indicates bleeding in the upper gastrointestinal (GI) tract, such as the: Stomach Duodenum
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