The information from wellness100 is right on. When doing biopsies they will reveal if the biopsy taken is cancerous or not. Problem is that you cannot biopsy the entire prostrate. When I was found to have prostrate cancer from 20 biopsies taken 5 areas were identified as cancer (all different Gleason Scores) my radiologist/oncologist told me the plan was to treat my entire prostrate.

Why I asked not just treat the known areas with cancer. He stated it would be so easy to miss an area that did have cancer and not treat it only to have the cancer continue to grow. So treat the whole prostrate. I have some post where the specific area is treated though versus all prostrate.

The PSMA test mentioned by wellness100 is a great test. It will show if cancer has spread outside of prostrate. I had the PSMA, bone scan, and Decipher tests done to get the most accurate information to provide a specific treatment plan for me.