What happen when MCV and RDW is high in blood test?

Mean corpuscular volume (MCV) is a measure of the average size of red blood cells. Red cell distribution width (RDW) is a measure of the variation in the size of red blood cells.

High MCV and RDW can be caused by a number of conditions, including:

* Vitamin B12 or folate deficiency: These vitamins are necessary for the production of red blood cells. A deficiency of either vitamin can lead to the production of larger, more oval red blood cells, which can increase the MCV and RDW.

* Iron deficiency: Iron is also necessary for the production of red blood cells. A deficiency of iron can lead to the production of smaller, paler red blood cells, which can decrease the MCV and RDW. However, in some cases, iron deficiency can also lead to an increase in MCV and RDW. This is because iron deficiency can cause the bone marrow to release immature red blood cells into the bloodstream, which can be larger than normal.

* Liver disease: Liver disease can interfere with the production of red blood cells and can also lead to the destruction of red blood cells. This can result in an increase in MCV and RDW.

* Kidney disease: Kidney disease can also interfere with the production of red blood cells and can also lead to the destruction of red blood cells. This can result in an increase in MCV and RDW.

* Certain medications: Some medications, such as chemotherapy drugs, can damage red blood cells and can lead to an increase in MCV and RDW.

* Alcohol abuse: Alcohol abuse can interfere with the production of red blood cells and can also lead to the destruction of red blood cells. This can result in an increase in MCV and RDW.

If you have high MCV and RDW, it is important to see a doctor to determine the cause. Treatment will depend on the underlying cause.