I was recently diagnosed with prostrate cancer. My PSA was 24. I switched my primary care doctor to Mayo in April, 2017. I had a previous primary care doctor, for 9 years, who never did a PSA test. The 1st thing my Mayo doctor did was a PSA – 2x – then a prostrate biopsy that confirmed my cancer. I have chosen proton beam radiation treatment and have just had my 4th – scheduled for a total of 45. After a lot of research, I strongly recommend proton therapy as an excellent treatment option.