Salvage Stereotactic Body Radiotherapy of the Prostate Bed for Biochemical Recurrence After Radical Prostatectomy.

5 fractions of SBRT to the prostate bed with or without whole pelvic radiotherapy Treatment every other day.

"Standard salvage radiotherapy to the prostate bed with or without whole pelvic radiotherapy. Each participating centre can specify upfront which RT schedule will be used in the control arm, with the choice between the following schedules:~* Hypofractionated: 20 fractions (Daily treatment (OTT 4-5 weeks))~* Normofractionated: 32-35 fractions (Daily treatment (OTT 7-8 weeks))"