Iron Deficiency Anemia · Pathology

A patient with iron deficiency anemia is started on oral ferrous sulfate. Which of the following is the first sign of an effective response to therapy?

  1. Increase in mean corpuscular volume (MCV)
  2. Increase in the reticulocyte count
  3. Normalization of ferritin levels
  4. Resolution of esophageal webs
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Correct answer: Increase in the reticulocyte count

The bone marrow responds to iron replacement within days. An increase in the reticulocyte count (peaking at 7-10 days) is the earliest objective laboratory sign that the patient is responding to iron therapy.

Difficulty: Medium Question 16 of 20

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