Can leukocytosis indicate leukemia?

Jul 21, 2022 Source: Cainiu Health
Disease description:

My nephew has recently experienced recurrent fever, and his lab test results show elevated white blood cell count. Could this elevation indicate leukemia?

Doctor's answer (1)
Dr. Li Man
Leukocytosis does not necessarily indicate leukemia; it may result from bacterial or mycoplasma infection, and other malignant diseases cannot be ruled out either. A definitive diagnosis cannot be made based solely on a complete blood count (CBC). If leukemia is suspected, the patient should undergo bone marrow aspiration under the guidance of a physician, which enables accurate diagnosis.