Best marker of iron deficiency anemia is?: (A) Serum iron, (B) Serum ferritin, (C) Total iron binding capacity, (D) Transferrin saturation
Answer is B. ANSWER: (B) Serum ferritinREF: Harrison's 18th ed ch: 103"Serum ferritin is the most specific and sensitive test for iron deficiency"Under steady-state conditions, the serum ferritin level correlates with total body iron stores; thus, the serum ferritinlevel is the most convenient laboratory test to estimate iron stores.