Question: what are bad psa numbers?
Answer: About 15% of men with a PSA below 4 will have prostate cancer if a biopsy is done. Men with a PSA level between 4 and 10 (often called the “borderline range”) have about a 1 in 4 chance of having prostate cancer. If the PSA is more than 10, the chance of having prostate cancer is over 50%.