Best marker for iron deficiency is: (A) Serum iron, (B) Serum ferritin, (C) Total iron binding capacity, (D) Transferrin saturation
Answer is B. Ref Harrison 19 th ed pg 627-628 The serum ferritin level is a better indicator of iron overload than the marrow iron stain. However, in addition to storage iron, the marrow iron stain provides information about the effective delivery of iron to develop- ing erythroblasts.