Lymphocytes (Absolute)

What is Lymphocytes (Absolute)?

Lymphocytes (absolute) measures the actual number of lymphocytes per microliter of blood. These crucial immune cells include T cells that coordinate immune responses, B cells that produce antibodies, and natural killer cells that destroy infected or cancerous cells. The absolute count provides more precise information than percentages alone.

Why is it Tested?

Doctors order absolute lymphocyte counts to assess immune system strength, diagnose immunodeficiency disorders, monitor viral infections, and evaluate response to treatments affecting immunity. This count is essential for managing HIV, monitoring chemotherapy effects, and assessing vaccine responses.

Normal Ranges

What do Abnormal Results Mean?

Abnormal results are not a diagnosis. Always discuss your results with a qualified healthcare provider before making any medical decisions.

Low Lymphocytes

Low absolute lymphocyte counts (lymphopenia) may indicate:

• Immunodeficiency disorders (primary or acquired)
• HIV infection or AIDS
• Autoimmune diseases (lupus, rheumatoid arthritis)
• Chemotherapy or radiation therapy
• Severe infections or sepsis
• Chronic kidney or liver disease
• Malnutrition

High Lymphocytes

Elevated absolute lymphocyte counts (lymphocytosis) commonly indicate:

• Viral infections (Epstein-Barr virus, cytomegalovirus)
• Chronic lymphocytic leukemia
• Other blood cancers (lymphoma)
• Pertussis (whooping cough)
• Chronic inflammatory conditions
• Stress or smoking

How to Track Over Time

Tracking absolute lymphocyte counts provides objective immune system monitoring, particularly important for patients with HIV, autoimmune diseases, or cancer treatments. Declining trends may indicate developing immunodeficiency, while rising counts help monitor recovery from illness or treatment.