Leukemoid Reaction

A leukemoid reaction is a marked increase in white blood cells in the blood that can resemble leukemia, but that in reality is a response to another cause, such as an infection or intense inflammation.

Why it happens: It is usually a response of the body to an underlying situation, not a blood disease in itself.

How it is identified: It is generally discovered in a blood test, and the symptoms depend on the cause that triggers it, such as fever or malaise.

Who evaluates it? The hematologist studies the reason for this elevation and distinguishes it from other blood conditions. When a test shows very high white blood cells, the right thing is to have a professional evaluate it to clarify its origin.