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Zapping cancer spots: could radiation delay the need for stronger drugs?

NCT ID NCT06927635

Disease control Sponsor: University Health Network, Toronto Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 26, 2026 · Last updated Jul 08, 2026 · Updated 3 times

Summary

This phase 2 trial tests whether giving focused radiation (SBRT) to a few growing prostate cancer spots, while staying on current therapy, can control the cancer better than switching to a new systemic therapy. About 75 men with castration-resistant prostate cancer that has a limited number of progressing lesions will be randomly assigned to either SBRT plus their current therapy or standard care (changing therapy). The main goals are to see if this approach is feasible and if it leads to a greater drop in PSA levels.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Stereotactic Body Radiation Therapy (SBRT)
What this could lead to
If successful, this could offer a way to delay switching to stronger systemic therapy by using targeted radiation to control progressing prostate cancer spots.
What could go wrong
This is a small, early-phase trial (75 people) testing feasibility, not yet proven to improve survival. Radiation may cause side effects, and not all patients may benefit.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 2

Tests whether the treatment actually works, and watches for side effects, in a larger group.

Participants

About 75 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jul 2025

Expected to finish

Jun 2030

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 100 years

Sex

Male participants only

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Age \>18 years * Able to provide informed consent * Histologic diagnosis of prostate adenocarcinoma * Castrate Resistance Prostate Cancer * Radiographic evidence of \<10 sites of extra-cranial OP metastatic lesions * Receiving any line of ST for \>3 months * All sites of OP disease are amenable to and can be safely treated with SBRT * ECOG performance status 0-3 Exclusion Criteria: * Evidence of spinal cord compression * Contraindication to radiotherapy

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Conditions

The condition(s) this trial relates to.

castration-resistant prostate carcinoma metastatic neoplasm

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Castrate resistance prostate cancer Oligoprogressive metastatic disease

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Princess Margaret Cancer Center

    RECRUITING

    Toronto, Ontario, M5G 2M9, Canada

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