Medscape explains that a high MCV count indicates the presence of larger-than-average red blood cells, known as macrocytic anemia. Possible causes for a high MCV count include folate deficiency anemia, vitamin B12 deficiency anemia, liver disease, hemolytic anemia, hypothyroidism, excessive alcohol intake and aplastic anemia. While the MCV test is a good indicator, follow up tests and a physical examination are typically used to confirm the diagnosis.Continue Reading
The MCV test, or mean corpuscular volume test, is part of the complete blood count test (CBC), and it is performed through venipuncture, according Medscape. Because nearly one-third of older patients have an elevated MCV count with no discernible cause and the test is not sufficient to make a diagnosis, the MCV test is rarely considered on its own. Instead, it is used in conjunction with other red blood cell tests administered as part of the CBC test.
A low MCV count indicates microcytic and hypochromic anemia, according to Medscape. This result means that red blood cells are smaller than average, and it indicates that a person is suffering from iron deficient anemia, anemia due to chronic disease, sideroblastic anemia or thalassemia. A normal MCV count, or normocytic and normochromic anemia, can also indicate additional types of anemia.Learn more about Medical Ranges & Levels