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Leukocyte alkaline phosphatase (LAP)

Overview Risks Results
Normal Values:
A staining score of 20 to 100 (out of a maximum of 400) is considered normal.
What abnormal results mean:
LAP is usually higher-than-normal with: LAP may be normal or higher-than-normal with:
  • Leukemoid reaction to infection
  • Women on oral contraceptives

LAP is usually lower-than-normal with chronic granulocytic leukemia.

LAP may be lower-than-normal with decreased bone marrow activity:

Primary thrombocythemia is an additional condition under which the test may be performed.

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