WBC count : Normal Values & Results (Leukocyte count, White blood cell count)

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WBC count

Alternate Names : Leukocyte count, White blood cell count

Normal Values

4,500-10,000 white blood cells per microliter (mcL).

Note: Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.

What do Abnormal Results Mean?

A low number of WBCs is called leukopenia. It may be due to:

Bone marrow failure (for example, due to infection, tumor, or abnormal scarring)
Collagen-vascular diseases (such as lupus erythematosus)
Disease of the liver or spleen
Radiation therapy or exposure

A high number of WBCs is called leukocytosis. It may be due to:

Anemia
Infectious diseases
Inflammatory disease (such as rheumatoid arthritis or allergy)
Leukemia
Severe emotional or physical stress
Tissue damage (for example, burns)

These lists are not all inclusive.

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WBC count : Definition
WBC count : Why is the Test Performed?
WBC count : How is the Test Performed?
WBC count : How to Prepare for the Test?
WBC count : How will the Test Feel?
WBC count : Risks
WBC count : Special Considerations
WBC count : Normal Values
WBC count : What do Abnormal Results Mean?
WBC count : References
WBC count : Pictures & Images
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Formed elements of blood
White blood cell count - series
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Review Date : 2/21/2009
Reviewed By : David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

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