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Blood in the stool can be described
as melena, hematochezia, or occult
blood. Melena refers to a black, tarry
stool that usually has a distinct odor. It
contains blood that has been present in
the gastrointestinal tract for a
prolonged period, allowing degradation of
hemoglobin by colonic flora. Melena
can portend significant blood loss that
typically originates from lesions
proximal to the ileocecal valve and often
above the ligament of Treitz. An
example of melena is the "currant jelly"
stool, which is composed of blood,
mucoid
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Click here for Causes of Rectal Bleeding in Children Author Disclosures Data Supplement
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T. Arvola, T. Ruuska, J. Keranen, H. Hyoty, S. Salminen, and E. Isolauri Rectal Bleeding in Infancy: Clinical, Allergological, and Microbiological Examination Pediatrics, April 1, 2006; 117(4): e760 - e768. [Abstract] [Full Text] [PDF] |
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