Background Prostate-specific antigen (PSA) is a protein produced by normal prostate cells. This enzyme participates in the dissolution of the seminal fluid coagulum and plays an important role in fertility. Levels of free PSA (fPSA) are unaffected by finasteride or dutasteride. PSA density (PSAD—that is, tPSA divided by prostate volume PSA behaviour after radiotherapy KONGO THANK YOU FOR THE REPLY. There is a article on the internet by professor Les Bradbury stating PSA levels decline slowly after radiotherapy & can take several years to reach nadir. In fact , the longer the time to reach nadir & the lower the value , the better the chances are of remaining disease free. Outlook. Prostate specific antigen (PSA) is a naturally occurring protein made in the prostate gland. Testing for elevated PSA levels can be a useful, but imperfect, tool in screening for prostate
A follow-up test called a free PSA (fPSA). This measures the percentage of PSA in your blood that is not bound to other proteins. The lower the level of this test, the more likely it is that prostate cancer is present. Other tests may also be done. The exact role of these tests in deciding on treatment is unclear.
Prostate-specific antigen (PSA) is now widely accepted as a useful tumor marker for the diagnosis and follow-up of prostatic cancer. An elevated level of PSA has been asserted to be highly specific for prostate cancer, although patients with large benign prostate glands and those with bacterial prostatitis may also have slightly elevated levels.
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psa and free psa levels