You will be asked to return for follow-up testing in the form of physical exam every 6 months for the first 2 years and once each year after that. The purpose of the follow-up visits and tests is to check the response of your cancer to treatment. If the PSA or physical exam shows that the disease has not gone away completely or has come back, you may have repeat staging with a bone scan, pelvic CT or magnetic resonance imaging (MRI), and repeat prostate biopsy.