Absolute Lymphocyte Count
- Sample Type
- Standard
- Fasting
- No
- Unit
- x10^9/L
The Absolute Lymphocyte Count (ALC) is a calculation derived from the total white blood cell count and the percentage of lymphocytes. It is a critical marker of immune status. Lymphocytes (T-cells, B-cells, and NK-cells) are responsible for the body's adaptive immune response. Within a Differential Count, ALC helps identify viral infections, monitor chronic lymphocytic leukemia (CLL), and assess the severity of immunodeficiencies like HIV/AIDS or the effects of immunosuppressive chemotherapy.
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Enter your lab result to see where you stand compared to the standard reference range.
Why Context Matters
ALC can be transiently affected by acute stress, exercise, or recent steroid administration. Diurnal variation exists, with counts often higher in the evening. A single abnormal value should be confirmed with a trend or peripheral blood smear.
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 Absolute Lymphocyte Count:
Official Sources
Research & Guidelines
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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