A useful test to help distinguish this disease is the leukocyte alkaline phosphatase (LAP) score, which should be low with CML and high with a leukemoid reaction.

• 须与类白血病相鉴别，可用的检测是粒细胞碱性磷酸酶（LAP），慢性髓性白血病较低而类白血病反应较高。