indications* for ordering a fecal occult blood test (FObT) Download Table Dark stool vs black stool the difference can be serious. Dark brown stool is often food or iron related. Black, tarry stool may indicate internal bleeding and needs urgent medical attention. Melena Wikipedia Stool Poop Color What it may mean Brown: In GrepMed The Quantity of Blood Required to Produce a Tarry Stool. How much? Melena, characterized by black tarry stools, can occur with as little as 50 cc of blood in the stomach. How When is stool color concerning?
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