Iron Deficiency Anemia · Pathology

The 'Mentzer Index' (MCV/RBC count) is used to differentiate between iron deficiency and which other condition?

  1. Aplastic anemia
  2. Thalassemia trait
  3. Sideroblastic anemia
  4. Folate deficiency
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Correct answer: Thalassemia trait

In iron deficiency, both MCV and RBC count are low (Mentzer index > 13). In Thalassemia trait, the MCV is very low but the RBC count is often normal or high (Mentzer index < 13), as the marrow overcompensates for the globin defect.

Difficulty: Medium Question 18 of 20

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