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A 55-year-old man who is a longtime alcoholic comes to the emergency room after vomiting small amounts of bright red blood four times today. Your differential diagnosis is constructed around causes of bleeding from the

  1. Colon

  2. Liver and pancreas

  3. Kidneys

  4. Lungs

  5. Upper gastrointestinal (GI) tract


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The answer is e.
Hematemesis or vomiting of blood represents an upper gastrointestinal (GI) source of blood loss. Bleeding from the colon will be manifested by either by no change in the color of the stools or by black, tarry-like stools (melena). Bleeding from the lungs results in blood in the sputum (hemoptysis) and from the kidneys as blood in the urine (hematuria), mainly microscopic hematuria.