Acid Phosphatase is a blood test that measures the level of an enzyme found in several tissues, including the prostate, red blood cells, liver, and bones. The test may be needed to evaluate certain prostate conditions, investigate abnormalities involving bones or blood cells, or support the assessment of specific diseases. Although prostate-specific antigen (PSA) is more commonly used today, acid phosphatase may provide additional clinical information in selected cases.
Acid phosphatase is an enzyme that works best in acidic conditions and is present in various tissues. Different forms of the enzyme may originate from different organs.
An elevated level can occur with certain prostate conditions, bone disorders, liver disease, or problems involving blood cells. The result must be interpreted with other clinical findings.
Historically, acid phosphatase was used to help evaluate prostate cancer, particularly advanced disease. Today, PSA is generally preferred for prostate cancer evaluation and monitoring.
No. An abnormal result does not by itself diagnose cancer. Further evaluation, including clinical examination, imaging, PSA or other laboratory tests, may be required.
Physical activity may influence some laboratory measurements. Follow any specific preparation instructions provided by your healthcare provider before testing.