25-Year disease-free survival rate after irradiation for prostate cancer calculated with the prostate specific antigen definition of recurrence used for radical prostatectomy.

Purpose: We addressed whether there is durable control of prostate cancer, defined as a prostate specific antigen cutoff of less than 0.2 ng/ml, greater than 20 years after irradiation for this disease. We also evaluated late recurrence, defined as recurrence after 10-year followup.