Megaloblastic Anemia · Pathology

Why is it critical to rule out Vitamin B12 deficiency before treating a macrocytic anemia with Folate alone?

  1. Folate will not improve the anemia
  2. Folate will worsen the anemia
  3. Folate can improve the anemia but allow neurological damage to progress
  4. Folate causes immediate B12 toxicity
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Correct answer: Folate can improve the anemia but allow neurological damage to progress

Folate supplementation can bypass the 'folate trap' and correct the megaloblastic anemia of B12 deficiency. However, it does not correct the underlying B12 deficiency, allowing the irreversible neurological degeneration to continue unnoticed.

Difficulty: Medium Question 19 of 20

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