Pancytopenia is a hallmark feature of which condition?

• A. Aplastic anemia
• B. Iron deficiency anemia
• C. Pernicious anemia
• D. Hemolytic anemia

Answer: (A)

Pancytopenia means low levels of red blood cells, white blood cells, and platelets, signaling bone marrow failure or suppression. Aplastic anemia is the classic condition where the marrow cannot produce all three blood cell lines, so red cells, white cells, and platelets are simultaneously reduced. In contrast, iron deficiency anemia primarily drops red cells with normal or near-normal white cells and platelets; pernicious anemia causes macrocytic anemia and may have mild reductions in other lines but not a true pancytopenia; hemolytic anemia involves destruction of red cells with the marrow usually compensating and other lines remaining normal. Thus, the scenario most consistent with pancytopenia is aplastic anemia.