The ferritin test is being used to screen for hereditary hemochromatosis. A healthy young woman has a low ferritin. Which of the following is most likely?

a. Homozygous hemochromatosis
b. Heterozygous hemochromatosis
c. Stage 2 iron deficiency
d. ACI

ANS: C
A low ferritin is found in stage 2 iron deficiency. In all the other conditions listed, the ferritin is normal to increased.

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