According to the NCI, a Gleason score of 6 or lower, a PSA level of 10-20 ng/ml, and an early tumor stage places you in the low-risk category. Together, these factors mean that the prostate cancer is unlikely to grow or spread to other tissues or organs for many years.
Some men in this risk category monitor their prostate cancer with active surveillance. They have frequent checkups that may include DREs, PSA tests, ultrasound or other imaging, and additional biopsies.