Unofficial: pathology - Definition :malena is the passage of black tarry stool due to the presence of altered of blood. Couses of malena: 1 hookworm 2 ulcer -peptic ,typhoid, | Facebook
Black stools: The 'most common cause of black and tarry poop' | Express.co.uk
Bloody or tarry stools Information | Mount Sinai - New York
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