To validate your PSA test see if there is a Quest lab nearby. I use Quest once in the last year to validate my test with the VA. My PSA has increased slightly over the years since proton radiation therapy in 2010. I suspect part of the issue is the aging factor. But, just to be certain, a "second opinion" was done thru Quest. For $75.00, it was worth it. Lastly, a second opinion or even a third is merited when issue of prostate issues arise. There are so many metrics in the disease that no man is like another. Each case seems unique based on age, quality of life, diet, exercise, health history and a host of other metrics. Do not depend on one doctor..reading many of the comments here over the years reinforces the recommendation of seeking validity of the issue by a second or third opinion.