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prostate specific antigen, PSA (noun). a protein manufactured exclusively by the prostate gland; PSA is produced for the ejaculate where it liquifies the semen and allows sperm cells to swim freely; elevated levels of PSA in blood serum are associated with benign prostatic hyperplasia and prostate cancer.see more on Definitions.net Â». protein manufactured exclusively by the prostate gland; PSA is produced for the ejaculate where it liquifies the semen and allows sperm cells to swim freely; elevated levels of PSA in blood serum are associated with benign prostatic hyperplasia and prostate cancer. see more on Definitions.net Â».
Your Prostate Specific Antigen or PSA. PSA results are derived from a recent blood test. PSA is produced in the blood by prostate cells, but production is accelerated when cells become cancerous. As the blood test is simple to administer, it is usually the first sign of prostate cancer. To discover out what levels are normal, learn more about PSA, select the icon to the right.