Radiation treatment comparison for metastatic prostate cancer

Consolidative Prostate Radiotherapy in Patients With Metastatic Prostate Cancer

Phase 2 Interventional University Health Network, Toronto · NCT05656794

This study is testing whether getting radiation treatment every other day for two weeks causes different side effects compared to getting it once a week for six weeks in men with metastatic prostate cancer.

Quick facts

PhasePhase 2
Study typeInterventional
Enrollment40 (estimated)
Ages18 Years to 100 Years
SexMale
SponsorUniversity Health Network, Toronto Academic / other
Drugs / interventionschemotherapy, radiation
Locations1 site (Toronto, Ontario)
Trial IDNCT05656794 on ClinicalTrials.gov

What this trial studies

This phase II trial investigates the side effects of two different radiation treatment schedules for patients with metastatic prostate cancer. Participants will receive radiation either every other day for two weeks or once weekly for six weeks. The study aims to determine if the frequency of treatment affects the side effects experienced by patients. It is a randomized trial, meaning participants will be assigned to one of the two treatment groups by chance.

Who should consider this trial

Good fit: Ideal candidates include adults aged 18 and older with histologically-proven metastatic prostate cancer and specific criteria regarding the volume and location of metastases.

Not a fit: Patients with prior pelvic radiotherapy or conditions that contraindicate radiotherapy may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could help optimize radiation treatment schedules to minimize side effects for patients with metastatic prostate cancer.

How similar studies have performed: While this approach is being tested in this specific context, similar studies have shown varying results in optimizing radiation schedules for cancer treatment.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Histologically-proven prostate cancer
* Presence of low-volume or high-volume metastases (high volume defined as the presence of visceral metastases or ≥4 bone lesions with at least 1 lesion beyond the vertebral bodies and pelvis.)
* Planned to or receiving systemic treatment ADT +/- ARAT as per physician discretion (Previous chemotherapy allowed if completed more than 6 weeks prior to randomization.)
* Planned for EBRT
* ECOG 0 or 1
* Age 18 years or older

Exclusion Criteria:

* Prior radiotherapy to pelvis
* Active ulcerative colitis or Crohn's Disease, at discretion of treating physician
* Any condition where radiotherapy is contraindicated

Where this trial is running

Toronto, Ontario

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Prostate Metastases
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.