Assessing ISUP prostate cancer grade groups in patients treated with definitive dose escalated external beam radiation

The five grade group system has been validated for men treated with radical prostatectomy. However, the prognostic value for men treated with radiation therapy is uncertain, with prior studies utilising old techniques and doses. We aimed to validate the International Society of Urological Pathology (ISUP) groupings for men treated with contemporary radiation therapy.Men with localised prostate cancer treated with image-guided, dose-escalated...