Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of Leukemoid reaction
Medically reviewed by Min Clinic Staff | Updated: January 2026
Leukemoid reaction: A benign condition in which the high number of white blood cells found on a blood test resembles the numbers seen in leukemia. For example, infectious mononucleosis can produce a leukemoid 'reaction.