| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated | 
| Patients with biochemical recurrence after primary treatment of prostate cancer presenting with ≤4 metastases |  
| Patiënten met biochemisch recidief na primaire behandeling van prostaatkanker met ≤4 metastasen |  | 
| E.1.1.1 | Medical condition in easily understood language | 
| Metastatic prostate cancer |  
| Uitgezaaide prostaat kanker |  | 
| E.1.1.2 | Therapeutic area | Diseases [C] - Cancer [C04] | 
| MedDRA Classification | 
| E.1.3 | Condition being studied is a rare disease | No | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial | 
| The overall aim of this project is to test the hypothesis that the addition of ADT to metastasis-directed radiotherapy (MDRT) in well-selected PCa patients with oligo-metastatic disease prolongs the metastases progression-free survival (MPFS) compared to MDRT alone |  
| Het algemene doel van dit project is de hypothese te testen dat de toevoeging van ADT aan metastase-gerichte radiotherapie (MDRT) bij goed geselecteerde PCa-patiënten met oligo-metastatische ziekte de metastasen-progressievrije overleving (MPFS) verlengt in vergelijking met alleen MDRT |  | 
| E.2.2 | Secondary objectives of the trial | 
| Not applicable |  
| Niet van toepassing |  | 
| E.2.3 | Trial contains a sub-study | No | 
| E.3 | Principal inclusion criteria | 
| 1.	Histologically proven initial diagnosis of adenocarcinoma of the Prostate. 2.	Biochemical recurrence of prostate cancer following primary local prostate treatment (radical prostatectomy, primary radiotherapy or radical prostatectomy +/- prostate bed adjuvant salvage radiotherapy) according to the EAU guidelines 2018. BCR after surgery: PSA > 0.1ng/ml. BCR after radiotherapy: PSA nadir +2 ng/ml (after exclusion of possible bounce effect).
 3.	Maximum 4 lesions (bone + lymph nodes) in total, without evidence of visceral metastases.
 a.	Nodal relapse (N1) in the pelvis on PSMA-PET scan with a maximum of 4 positive lymph nodes. The upper limit of the pelvis is defined as the aortic bifurcation.
 b.	Nodal relapse (M1) on PSMA-PET scan above the aortic bifurcation with a maximum of 3 positive lymph nodes.
 c.	Bone relapse on PSMA-PET scan with a maximum of 3 lesions.
 4.	 Age > 18 years.
 5.	PSMA-PET/CT scan or PSMA-PET/MRI within 60 days prior to randomization.
 6.	PSA < 10 ng/ml.
 7.	In case of chronic use of finasteride the PSA value should be < 5 ng/ml
 8.	WHO performance state 0-2.
 9.	Signed informed consent prior to registration/randomization.
 
 |  
| 1. Histologisch bewezen initiële diagnose van adenocarcinoom van de prostaat. 2. Biochemische herhaling van prostaatkanker na primaire lokale prostaatbehandeling (radicale prostatectomie, primaire radiotherapie of radicale prostatectomie +/- adjuvante berging radiotherapie) volgens de EAU-richtlijnen 2018. BCR na chirurgie: PSA> 0,1 ng / ml. BCR na radiotherapie: PSA nadir +2 ng / ml (na uitsluiting van mogelijk bounce-effect).
 3. Maximaal 4 laesies (bot + lymfeklieren) in totaal, zonder bewijs van viscerale metastasen.
 a. Nodal recidief (N1) in het bekken op PSMA-PET scan met maximaal 4 positieve lymfeklieren. De bovengrens van het bekken wordt gedefinieerd als de aortabifurcatie.
 b. Nodale recidief (M1) op PSMA-PET scan boven de aortabifurcatie met maximaal 3 positieve lymfeklieren.
 c. Terugval van het bot op PSMA-PET scan met maximaal 3 laesies.
 4. Leeftijd> 18 jaar.
 5. PSMA-PET/CT scan of PSMA-PET/MRI binnen 60 dagen voorafgaand aan randomisatie.
 6. PSA <10 ng / ml.
 7. In geval van chronisch gebruik van finasteride moet de PSA-waarde <5 ng / ml zijn
 8. WHO-prestatiestatus 0-2.
 9. Ondertekende geïnformeerde toestemming voorafgaand aan registratie / randomisatie.
 |  | 
| E.4 | Principal exclusion criteria | 
| 1.	Visceral metastases. 2.	PSA ≥ 10 ng/ml.
 3.	PSA-doubling time < 3 months.
 4.	ADT or chemotherapy for recurrent PCa.
 5.	Testosterone < 1.7 nmol/l
 6.	Painful metastases needed pain medication
 7.	Previous or concurrent invasive active cancers other than superficial non-melanoma skin cancers.
 8.	Inability to understand the information on trial-related topics, to give informed consent or to fill out QoL questionnaires.
 
 |  
| Tekst 
 
 Documenten
 
 
 
 
 
 
 
 
 
 
 Taal herkennen
 
 
 Engels
 
 Nederlands
 Frans
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Nederlands
 
 Engels
 
 Frans
 
 
 
 
 
 
 
 
 
 
 
 
 1.	Visceral metastases.
 2.	PSA ≥ 10 ng/ml.
 3.	PSA-doubling time < 3 months.
 4.	ADT or chemotherapy for recurrent PCa.
 5.	Testosterone < 1.7 nmol/l
 6.	Painful metastases needed pain medication
 7.	Previous or concurrent invasive active cancers other than superficial non-melanoma skin cancers.
 8.	Inability to understand the information on trial-related topics, to give informed consent or to fill out QoL questionnaires.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 422/5000
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 1. Viscerale metastasen.
 2. PSA ≥ 10 ng / ml.
 3. PSA-verdubbelingstijd <3 maanden.
 4. ADT of chemotherapie voor terugkerende PCa.
 5. Testosteron <1,7 nmol / l
 6. Pijnlijke metastasen hadden pijnmedicatie nodig
 7. Eerdere of gelijktijdige invasieve actieve kankers anders dan oppervlakkige niet-melanoom huidkanker.
 8. Onvermogen om de informatie over proefgerelateerde onderwerpen te begrijpen, geïnformeerde toestemming te geven of QoL-vragenlijsten in te vullen.
 |  | 
| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| The primary endpoint is the 2-year metastases progression free survival |  
| Het primaire eindpunt is de 2-jarige metastasen progressievrije overleving |  | 
| E.5.1.1 | Timepoint(s) of evaluation of this end point |  | 
| E.5.2 | Secondary end point(s) | 
| Secondary endpoints are acute and late toxicity, quality of life (QoL), biochemical recurrence free survival and overall survival 
 -	3 years PSA progression
 -	Start of 2nd line treatment
 -	Start 2nd MDRT treatment for new (progressive) oligo-metastases
 -	Acute and late toxicity (late toxicity up to 3 years)
 -	Clinical progression-free survival
 -	Quality of life
 -	Relapse pattern
 -	Time to start of palliative ADT
 -	Time to castration-resistance
 -	Disease-specific and overall survival
 -	Sensitivity of the imaging modality (PSMA-PET/CT or PSMA-PET/MRI) for patients receiving MDRT
 |  
| Secundaire eindpunten zijn acute en late toxiciteit, kwaliteit van leven (QoL), biochemische recidiefvrije overleving en totale overleving 
 |  | 
| E.5.2.1 | Timepoint(s) of evaluation of this end point |  | 
| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis | No | 
| E.6.2 | Prophylaxis | No | 
| E.6.3 | Therapy | Yes | 
| E.6.4 | Safety | No | 
| E.6.5 | Efficacy | No | 
| E.6.6 | Pharmacokinetic | No | 
| E.6.7 | Pharmacodynamic | No | 
| E.6.8 | Bioequivalence | No | 
| E.6.9 | Dose response | No | 
| E.6.10 | Pharmacogenetic | No | 
| E.6.11 | Pharmacogenomic | No | 
| E.6.12 | Pharmacoeconomic | No | 
| E.6.13 | Others | No | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) | No | 
| E.7.1.1 | First administration to humans | No | 
| E.7.1.2 | Bioequivalence study | No | 
| E.7.1.3 | Other | No | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) | No | 
| E.7.3 | Therapeutic confirmatory (Phase III) | Yes | 
| E.7.4 | Therapeutic use (Phase IV) | No | 
| E.8 Design of the trial | 
| E.8.1 | Controlled | Yes | 
| E.8.1.1 | Randomised | Yes | 
| E.8.1.2 | Open | Yes | 
| E.8.1.3 | Single blind | No | 
| E.8.1.4 | Double blind | No | 
| E.8.1.5 | Parallel group | No | 
| E.8.1.6 | Cross over | No | 
| E.8.1.7 | Other | No | 
| E.8.2 | Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) | No | 
| E.8.2.2 | Placebo | No | 
| E.8.2.3 | Other | Yes | 
| E.8.2.3.1 | Comparator description | 
| alleen radiotherapie |  
| only radiotherapy |  | 
| E.8.2.4 | Number of treatment arms in the trial | 2 | 
| E.8.3 | The trial involves single site in the Member State concerned | No | 
| E.8.4 | The trial involves multiple sites in the Member State concerned | Yes | 
| E.8.4.1 | Number of sites anticipated in Member State concerned | 10 | 
| E.8.5 | The trial involves multiple Member States | No | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA | No | 
| E.8.6.2 | Trial being conducted completely outside of the EEA | No | 
| E.8.7 | Trial has a data monitoring committee | No | 
| E.8.8 | Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial |  | 
| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years | 3 | 
| E.8.9.1 | In the Member State concerned months | 0 | 
| E.8.9.1 | In the Member State concerned days | 0 |