What is Acid Phosphatase?

Acid phosphatase is an enzyme found throughout the body, but primarily in the prostate gland. Like all enzymes, it is needed to trigger specific chemical reactions. Acid phosphatase testing is done to diagnose whether prostate cancer has spread to other parts of the body (metastasized), and to check the effectiveness of treatment. The test has been largely supplanted by the prostate specific antigen test (PSA).

Alternative Names

prostatic acid phosphatase test, serum acid phosphatase test, PAP test, tartrate-resistant acid phosphatase test, TRAP test.


  


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