Prostate cancer is what killed my dad at age 66.
This is my public service announcement: Once you reach age 50, insist to your doctor that you have your PSA level included every time you have bloodwork (cholestorol, blood sugar, etc.) done and do it at least every 6 months.
If you have a father, grandfather, uncle, or great uncle who has been diagnosed with prostate cancer, start getting your PSA level checked at age 40.