The Prostate Specific Antigen (PSA) test is a common screening for prostate cancer. This test measures a protein that is produced by the prostate gland. Elevated PSA levels may indicate a higher likelihood of having prostate cancer. The PSA test is also used to monitor a person's response to cancer treatment.
It is important to note that not all cases of prostate cancer will show elevated total PSA levels and there are other conditions which may cause higher PSA levels besides cancer.
The PSA test is often recommended as a yearly screening for men over the age of 50. Those with a family history of prostate cancer may wish to begin screening earlier.