Re: Reminder about PSA terminology please
At the site of the National Cancer Institute you can read details about the PSA and its “derivates” when in the diagnosis and control of treatment progress. Here is the link;
From the Wikipedia they write this;
Most PSA in the blood is bound to serum proteins. A small amount is not protein bound and is called 'free PSA'. In men with prostate cancer the ratio of free (unbound) PSA to total PSA is decreased. The risk of cancer increases if the free to total ratio is less than 25%. (See graph at right.) The lower the ratio is, the greater the probability of prostate cancer. Measuring the ratio of free to total PSA appears to be particularly promising for eliminating unnecessary biopsies in men with PSA levels between 4 and 10 ng/mL. However, both total and free PSA increase immediately after ejaculation, returning slowly to baseline levels within 24 hours.”
The results of your last test calculate a ratio of free PSA at approximately 20% but your PSA of 0.049 is so low that hardly you would find a doctor diagnosing you with prostate cancer.
I wonder what made you take a free PSA. Have you had a positive DRE?
Last edited by Baptista; 11-12-2012 at 12:48 PM.