What do you consider to be most helpful in distinguishing iron deficiency from thalassemia minor (trait) in a 30 yo female patient with Hb 10, MCV 69 (nope, I am not offering ferritin or smear 😉)?
30%
Hb electrophoresis
25%
Old CBC from 20 yrs ago
32%
Mentzer index
13%
MCHC
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