Leukocyte count

Leukocyte count is a medical test that measures the number of leukocytes, or white blood cells, in a volume of blood. It is often performed as part of a complete blood count (CBC), which provides information about the cells in a person's blood. Leukocyte count is an important tool in medical diagnosis as it can indicate the presence of various diseases and conditions.

Overview

Leukocytes are a key part of the body's immune system, helping to fight off diseases and infections. A high leukocyte count, known as leukocytosis, can indicate an infection, inflammation, leukemia, trauma, or stress. A low leukocyte count, known as leukopenia, can indicate a risk of infections, certain types of cancer, or an autoimmune disorder.

Procedure

The leukocyte count is usually performed as part of a complete blood count (CBC). A sample of blood is drawn from a vein, typically from the inside of the elbow or the back of the hand. The blood sample is then sent to a laboratory, where it is analyzed to determine the number of leukocytes.

Interpretation

The normal range for a leukocyte count varies from laboratory to laboratory but is usually between 4,500 and 11,000 leukocytes per microliter of blood. A count less than 4,500 or greater than 11,000 is considered abnormal.

See also

• Complete blood count
• Leukocytosis
• Leukopenia

Leukocyte count Resources
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