Lymphocytes
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, limfociti
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.
Frequently asked questions
- What is a normal Lymphocytes level?
- A typical reference range for Lymphocytes is 20–40 % (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is Lymphocytes measured in?
- Lymphocytes is most commonly reported in %. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do Lymphocytes reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track Lymphocytes over time?
- Yes. Upload results from any lab and BloodId charts your Lymphocytes over time against its reference range, so you can see whether the trend is rising, falling, or stable.
Related biomarkers
Source: MedlinePlus, U.S. National Library of Medicine
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