Red Cell Distribution Width (RDW)

Red Cell Distribution Width (RDW)

Analyzer Report

Disclaimer: THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for informational purposes only and is not a substitute for professional medical consultation, diagnosis, or treatment.

Frequently Asked Questions

What does the RDW indicate?

The RDW( Red Cell Distribution range) is a measure of the variation in size of red blood cells( erythrocytes) in a blood sample. It’s generally reported as a percentage. The RDW provides information about the degree of anisocytosis, which refers to the variation in the size of red blood cells.

What does a low RDW show?

A low RDW isn’t generally considered a cause for concern on its own. It can be seen in certain conditions, similar as iron insufficiency anemia, where the red blood cells come lower and further livery in size. Other types of anemia, similar as thalassemia or habitual complaint anemia, can also lead to a low RDW.

What does a high RDW show?

RDW is frequently used as a part of a complete blood count( CBC) test and can give precious information about the health of a person’s blood cells. A high RDW may indicate several possible conditions or factors, including

RDW can be elevated in different types of anemia, similar to iron insufficiency anemia, vitamin B12 insufficiency anemia, and folate insufficiency anemia. In these conditions, the bone marrow may produce red blood cells that vary in size. Certain nutrient scarcities, similar as iron, vitamin B12, or folate scarcities, can lead to changes in red blood cell size and affect a high RDW.


Hemolysis refers to the unseasonable destruction of red blood cells. Conditions similar as autoimmune hemolytic anemia or certain inheritable diseases can beget hemolysis, leading to a high RDW. Bone marrow disease conditions affecting the bone gist, similar to the myelodysplastic pattern (MDS) or leukemia, can result in abnormal production of red blood cells, leading to an increased RDW.

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