Iron overload occurs in all except
Ref Harrison 19 th ed pg 626, 673 Increased erythropoietin leads to increased haematopoasis and an increased demand for iron producing a state of iron deficiency. Polycythemia vera being a state of increased erythropoietin is a cause of iron deficiency rather than iron overload.
Thalassemia
Myelodysplastic syndrome
Polycythemia vera
Sideroblastic anemia
Haematology