Fig. 2

Percentual decrease/increase of PSA levels in individual patients from the time of salvage radiotherapy until last follow-up (average time: 30.2 months). Patients without (w/o) androgen deprivation therapy (ADT) in black and patients with ADT concomitant to radiotherapy in grey. Patient 11 initiated ADT during follow-up, patients 16 and 19 discontinued ADT longer than 6 months before measuring last PSA value. T+, N+, Ma + or Mb + indicates (irradiated) PSMA-PET findings of local, lymphnode or distant lymphnode (Ma+) or bony (Mb+) recurrences. Patients 3, 8 and 9 underwent re-irradiation of novel metastases during follow-up