Maybe his saying “controversial” is the wrong word. However, questions about accuracy may be more appropriate. Why? A man can have a high PSA and not have any cancer. A man with a very low PSA could have cancer. Using PSA along with other factors is the best way to determine the risk of cancer. I will also say this: I recently had an MRI which showed nothing. My urologist told me the MRI can only detect cancer in about 80% of the prostate. I then had the biopsy and they found cancer in one of 14 cores. 3+4=7. I decided I’m having it removed in a little over a week. Good luck.

Sorry, I should have been clearer. But I used that word because that's what the Mayo Clinic used in their book "Mayo Clinic on Prostate Health" (2022) - "PSA testing remains controversial" -- when describing the accuracy of PSA tests. I believe the example that kjacko gives in his post is a good example. My Primary Care Physician calls PSA testing a "quagmire."