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Mean Corpuscular Volume (MCV) measures the volume of red blood cells using hematocrit and red blood cell count. It is indication of the size of the red blood cells. Normal range is between 80 and 96 depending on the individual laboratory.

MCV is used along with Red Cell Distribution Width (RDW) in order to determine the cause of anemia. With the addition of RDW, Mean corpuscular hemoglobin (MCH), and mean corpuscular hemoglobin concentration (MCHC) are no longer clinically used because of their limitations.

MCV is elevated (greater than 96) in:
– Vitamin B12 deficiency (Elevated RDW)
– Folate deficiency (Elevated RDW)
– Medications: Methotrexate, Imuran, Hydroxyurea (Normal RDW)
– Alcohol (Normal RDW)
– Liver disease (Elevated RDW)
– Multiple myeloma (Elevated RDW)
– Myelodysplastic syndrome (Elevated RDW)

MCV is normal (Between 80-96):
– Chronic disease (Elevated RDW)
– Renal failure (Elevated RDW)
– Sickle cell Anemia (Elevated RDW)
– Early Vitamin B12 and iron deficiency or mixed deficiencies (Elevated RDW)

MCV is low (less than 80) in:
– Iron deficiency (Elevated RDW)
– Toxins and drugs (Normal RDW)
– Thalassemia (Normal RDW)
– Myelodysplastic Syndrome (Elevated RDW)