Hi, Dr,
It is great appreciated for your response. I was read about
PSA test fPSA and cPSA. My friend had
PSA test for past few years since age of 49, PSA range 1.3-1.4. This year, PSA jump to 9.6, then repeat after 5 week, PSA come back 3.8, at the same time did free PSA, but fPSA is very low, and up %fPSA/PSA about 11%, and this may need biopsy. But as I mention, PSA shows so much difference in such a short time. What is his means and the if PSA and fPSA really correct or accurate?