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Leukemoid reaction

Definition

A leukemoid reaction is a reactive increase in the white blood cell count, which can mimic leukemia.The reaction is actually due to an infection or another disease and is not a sign of cancer.

Blood counts usually return to normal when the underlying condition is treated.

References

Nola M, Dotlic S. The hematopoietic and lymphoid systems. In: Damjanov I, ed. Pathology Secrets. 3rd ed. Philadelphia, PA: Elsevier Mosby; 2009:chap 9.


Review Date: 5/29/2014
Reviewed By: Yi-Bin Chen, MD, Leukemia/Bone Marrow Transplant Program, Massachusetts General Hospital, Boston, MA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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