Why is RDWCV on a full blood count low as 12.1 The normal range 14 - 16?

RDWCV (Red cell distribution width) is a measure of the variation in the size of red blood cells (erythrocytes).

A low RDWCV indicates that the red blood cells are more uniform in size. This can be a sign of various conditions, including:

- Iron deficiency anemia: Iron is essential for the production of hemoglobin, which is the oxygen-carrying protein in red blood cells. When iron levels are low, the red blood cells can become smaller and more uniform in size.

- Vitamin B12 and folate deficiency: Vitamin B12 and folate are also essential for the production of red blood cells. When levels of these vitamins are low, the red blood cells can become larger and more variable in size.

- Chronic diseases: A variety of chronic diseases, including cancer, kidney disease, and liver disease, can lead to a low RDWCV.

- Medications: Some medications, such as chemotherapy drugs, can cause a low RDWCV.

If you have a low RDWCV, your doctor may order additional tests to determine the cause. Treatment will depend on the underlying cause of the low RDWCV.