Which condition is an example of an iron-loading anemia associated with ineffective erythropoiesis?

Which condition is an example of an iron-loading anemia associated with ineffective erythropoiesis?

• A. Aplastic anemia
• B. Megaloblastic anemia
• C. Thalassemia syndromes
• D. Sickle cell disease

Answer: (C)

Iron-loading anemia from ineffective erythropoiesis happens when the marrow is driving a strong erythropoietic response to produce red cells, but many precursors fail to mature. This expanded erythropoietic activity suppresses hepcidin, the hormone that normally limits intestinal iron absorption, so more iron is absorbed and deposited in tissues. Thalassemia syndromes are classic because the imbalance of globin chains causes ongoing ineffective erythropoiesis with a high erythropoietic drive, leading to iron overload even before transfusions and continuing as the drive persists. Aplastic anemia features a failure of the marrow with little erythropoietic activity, so iron overload due to increased absorption isn’t a defining feature here and is more often related to transfusion history. Megaloblastic anemia stems from impaired DNA synthesis in precursors and does not characteristically cause iron loading from increased absorption. Sickle cell disease can have iron overload, but the primary driver is transfusional iron or hemolysis-related iron turnover rather than iron loading from ineffective erythropoiesis.

Iron-loading anemia from ineffective erythropoiesis happens when the marrow is driving a strong erythropoietic response to produce red cells, but many precursors fail to mature. This expanded erythropoietic activity suppresses hepcidin, the hormone that normally limits intestinal iron absorption, so more iron is absorbed and deposited in tissues. Thalassemia syndromes are classic because the imbalance of globin chains causes ongoing ineffective erythropoiesis with a high erythropoietic drive, leading to iron overload even before transfusions and continuing as the drive persists.

Aplastic anemia features a failure of the marrow with little erythropoietic activity, so iron overload due to increased absorption isn’t a defining feature here and is more often related to transfusion history. Megaloblastic anemia stems from impaired DNA synthesis in precursors and does not characteristically cause iron loading from increased absorption. Sickle cell disease can have iron overload, but the primary driver is transfusional iron or hemolysis-related iron turnover rather than iron loading from ineffective erythropoiesis.