Evaluation of Prostate Specific Membrane Antigen Positron Emission Tomography-Computed Tomography in Active Surveillance for Prostate CancEr

Inclusion Criteria: * Males aged ≥ 18. * Histologically confirmed low or favorable intermediate risk prostate cancer per NCCN guidelines. (Note: Grade Group 2 must have 20% or less involvement in every core and no presence of cribiform or intraductal carcinoma). * PSA \< 20 ng/ml. * Ability to undergo yearly PSMA-PET CT. * Ability to undergo yearly prostate mpMRI. * Ability to undergo transrectal or transperineal template and fusion prostate biopsy. * Willingness to undergo yearly prostate biopsies. Exclusion Criteria: * History of prior treatment for prostate cancer. * History of systemic therapy for prostate cancer. * Inability to undergo transrectal ultrasound. * Life expectancy less than 10 years. * Not interested in pursuing active surveillance. * Initial diagnosis of prostate cancer greater than 15 months.