Black, tarry faeces caused by bleeding, usually in the upper gastrointestinal tract. The blood is blackened by the action of secretions during digestion. Melaena is usually caused by a peptic ulcer but may indicate cancer.
Melaena |
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Melaena |
Black, tarry faeces caused by bleeding, usually in the upper gastrointestinal tract. The blood is blackened by the action of secretions during digestion. Melaena is usually caused by a peptic ulcer but may indicate cancer. |
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