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Leukocyte alkaline phosphatase (LAP)

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.


Review Date: 2/3/2005
Reviewed By: Rita Nanda, M.D., Department of Hematology/Oncology, University of Chicago Medical Center, Chicago, IL. Review provided by VeriMed Healthcare Network.

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