In a patient with a duodenal ulcer bleed and melena, which diagnosis could be considered as a potential query focus?

• A. Iron deficiency anemia
• B. Acute blood loss anemia
• C. Pernicious anemia
• D. Aplastic anemia

Answer: (B)

The key idea is recognizing the immediate type of anemia caused by an actual bleeding event in the gastrointestinal tract. A duodenal ulcer that bleeds and produces melena represents acute blood loss into the GI tract, so the most relevant diagnosis to consider is acute blood loss anemia. This form of anemia arises from the rapid loss of red blood cells during the bleed, and the clinical focus is on assessing volume status, ongoing blood loss, and the hemoglobin drop.

Iron deficiency anemia would come from longer-standing blood loss and typically presents as microcytic, hypochromic anemia after some time, not as the immediate concern in an acute bleed. Pernicious anemia involves B12 deficiency with macrocytic changes and is not driven by acute GI bleeding. Aplastic anemia is a bone marrow failure causing pancytopenia, unrelated to a GI bleed event.