Lymphocyte Count: Normal Ranges & When to Be Concerned

A lymphocyte count of 8,900/µL in an adult female is elevated. The typical reference range for adults is 1,000–4,800/µL (varies slightly by lab).

Possible Causes of Lymphocytosis

• Acute viral infections (EBV, CMV, influenza, hepatitis)
• Chronic infections (TB, brucellosis)
• Certain bacterial infections (pertussis, syphilis)
• Lymphoproliferative disorders (CLL, lymphoma)
• Autoimmune conditions
• Strorticosteroid use, splenectomy

Next Steps

• Review clinical context: fever, weight loss, night sweats, lymphadenopathy?
• Repeat CBC with differential to confirm.
• Peripheral blood smear may show atypical lymphocytes.
• Consult a hematologist if count persists or symptoms suggest malignancy.

An isolated elevated count without symptoms may be reactive, but medical evaluation is warranted.