Which type of anemia can result from damage to hematopoietic cells by infection, drugs, or radiation?

Which type of anemia can result from damage to hematopoietic cells by infection, drugs, or radiation?

• A. Diminished erythropoiesis anemia
• B. Aplastic anemia
• C. Hemolytic anemia
• D. Iron deficiency anemia

Answer: (A)

When the hematopoietic stem and progenitor cells in the bone marrow are damaged by infection, drugs, or radiation, the marrow’s ability to produce blood cells drops dramatically. This leads to aplastic anemia, a condition in which the marrow becomes hypocellular and is often replaced by fat, resulting in a pancytopenic peripheral blood picture (low red cells, white cells, and platelets). The anemia from this process is typically normocytic and normochromic because the problem is reduced production rather than a defect in hemoglobin synthesis or a loss of red cells. Understanding the contrast helps reinforce the concept: hemolytic anemia is due to increased destruction of circulating red cells, so you’d see reticulocytosis and markers of hemolysis; iron deficiency anemia stems from insufficient iron for hemoglobin synthesis, leading to microcytic, hypochromic cells and low iron stores; the general idea of diminished erythropoiesis can describe many conditions, but the specific scenario of damage to bone marrow hematopoietic cells aligns best with aplastic anemia, where the root issue is failure of the marrow’s production across all cell lines.

When the hematopoietic stem and progenitor cells in the bone marrow are damaged by infection, drugs, or radiation, the marrow’s ability to produce blood cells drops dramatically. This leads to aplastic anemia, a condition in which the marrow becomes hypocellular and is often replaced by fat, resulting in a pancytopenic peripheral blood picture (low red cells, white cells, and platelets). The anemia from this process is typically normocytic and normochromic because the problem is reduced production rather than a defect in hemoglobin synthesis or a loss of red cells.

Understanding the contrast helps reinforce the concept: hemolytic anemia is due to increased destruction of circulating red cells, so you’d see reticulocytosis and markers of hemolysis; iron deficiency anemia stems from insufficient iron for hemoglobin synthesis, leading to microcytic, hypochromic cells and low iron stores; the general idea of diminished erythropoiesis can describe many conditions, but the specific scenario of damage to bone marrow hematopoietic cells aligns best with aplastic anemia, where the root issue is failure of the marrow’s production across all cell lines.