Determine cause: A low MCV could be due to iron deficiency; however, before increasing iron intake have your iron studies checked. Another possible cause of low MCV is a hereditary condition known as thallasemia (low MCV with normal iron levels).
Answered 10/6/2015
4.9k views
Why do you ask?: A very low mcv with other labs basically normal is usually Thal minor, a mild genetic variant that you simply need to understand. Low mcv can also warn of iron deficiency or a few other serious problems. Lab values aren't things to treat. Find the reason.
Answered 9/29/2016
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