Prostate brachytherapy, either alone or in combination with external beam radiation, is associated with longer overall survival in men with favorable pathologic Group 4 (Gleason score 8) prostate cancer.
Jackson MW, Amini A, Jones BL, Kavanagh B, Maroni P, Frank SJ, Mahmood U, Kudchadker RJ, Pugh TJ. Prostate brachytherapy, either alone or in combination with external beam radiation, is associated with longer overall survival in men with favorable pathologic Group 4 (Gleason score 8) prostate cancer. Brachytherapy. 2017 Jul - Aug; 16(4):790-796.