PSA Test Normal Value

The Prostate Specific Antigen(PSA) test is a blood test used primarily to screen for prostate cancer.

Prostate specific antigen (PSA) is a protein produced primarily by cells in the prostate, this test measures the amount of PSA in the blood.

Test Sample

A blood sample from your arm vein.

Test Preparation

Avoid ejaculation for 24 hours as it has been associated with elevated PSA levels.

The sample should be collected prior to a digital rectal exam (DRE) and prior to (or several weeks after) a prostate biopsy, your health provider will arrange them in proper order.

Results

When total PSA value is lower than 4.0 ng/ml, the presence of prostate cancer is considered unlikely. But some argue that 2.5 ng/ml should be the line.

Total PSA levels between 4.0 ng/ml and 10 ng/ml may indicate about 25% chance of prostate cancer.

Total PSA level higher than 10 ng/ml is considered higher chance of prostate cancer, more than 50%.

 

However, PSA test isn’t a diagnostic of cancer. When the PSA value goes higher than 10 ng/ml, doctors will order prostate biopsy.