Lymphocytes are white blood cells that include T cells, B cells, and natural killer cells. They are key to immune defense and producing antibodies.
Category: Complete Blood Count
Also known as: lymphocytes, lymph, lymphocyte %, lymphs
Reference range: 20–40 % (Source: ABIM)
Standard unit: %
High values may indicate
High lymphocytes (lymphocytosis) may indicate viral infections, chronic lymphocytic leukemia, or tuberculosis.
Low values may indicate
Low lymphocytes (lymphopenia) may indicate HIV/AIDS, autoimmune disorders, steroid use, or bone marrow problems.
Source: MedlinePlus, U.S. National Library of Medicine
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