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Related to melaena: hematochezia


The discharge of stools colored black by altered blood.



formless, viscous, black stools, resembling pitch; one of the most important symptoms of internal hemorrhage in the digestive tract.

References in periodicals archive ?
On admission she was very pale and tired, she had passed large quantities of melaena at home before being brought in by ambulance, and had already spent several hours in the emergency department.
However, any sudden drop in haemoglobin or haematocrit is an indication for endoscopy, irrespective of whether it has been associated with haematemesis, haematochezia or melaena.
Bleeding usually manifests as gingival bleeding, epistaxis, purpura, haematemesis, melaena, haematuria, extensive ecchymoses, and in severe cases, subarachnoid or intracerebral haemorrhage.