The Prostate Active Surveillance Study is for men with prostate cancer who choose not to have immediate treatment but be closely monitored instead. This study looks to find signs, or biomarkers, that can show which cancers might grow fast or stay slow. Participants will undergo regular tests, including a prostate biopsy, which is a test that takes a tiny piece of the prostate to look for cancer cells. Men eligible for the study must have prostate cancer that hasn't been treated yet and must agree to the regular tests and check-ups.

• The study requires regular prostate checks, including biopsies, to track the cancer.
• No previous prostate cancer treatments are allowed for participants.
• Participants must be willing to undergo all study procedures and agree to follow-up visits.