Lymphocytes
- Sample Type
- Standard
- Fasting
- No
- Unit
- %
Lymphocytes are a type of white blood cell (WBC) crucial for the immune system, consisting of T-cells, B-cells, and natural killer (NK) cells. In the context of a Differential Count (DC), the percentage of lymphocytes helps identify the nature of an immune response. They are primarily responsible for adaptive immunity, including antibody production and direct destruction of infected or cancerous cells. Monitoring lymphocyte levels is essential for diagnosing viral infections, autoimmune disorders, and certain hematological malignancies.
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Enter your lab result to see where you stand compared to the standard reference range.
Why Context Matters
Lymphocyte percentages can be transiently affected by acute stress, intense physical exercise, or recent vaccination. Furthermore, a high percentage might actually reflect a low absolute count of other WBC types (pseudolymphocytosis), necessitating a review of absolute counts and peripheral blood smears by a hematopathologist.
Lab ranges are statistical averages, not biological laws. "Normal" for a 20-year-old male isn't normal for a 60-year-old female.
Clinical References
Source-of-truth databases and clinical guidelines for Lymphocytes:
Official Sources
Research & Guidelines
- PubMed: Lymphocytes Clinical GuidelinesNCBI / PubMed
Related Indicators
Medically Reviewed by Dr. Binoy Babu, MBBS
Board Certified Doctor • 10+ Years Clinical Experience
Dr. Babu is a practicing physician dedicated to empowering patients with clear, actionable medical information. He founded 2opi to bridge the gap between complex lab reports and patient understanding, ensuring everyone has access to a reliable second opinion.
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