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Study identifier: NCT06918951 Synced from ClinicalTrials.gov · July 29, 2026
● Recruiting

Stereotactic Radiotherapy Versus Palliative Conventional Radiotherapy for Oligoprogressive Metastatic Cancers

Condition: Oligoprogression · Oligometastatic Disease · OligoProgressive Metastatic Disease  ·  Sponsor: British Columbia Cancer Agency

PhaseNA
Planned participants194
Who can joinAll sexes, 19 Years to no upper limit
Healthy volunteersNo

About this study

STOP-2 is a phase III multi-institutional double-blind randomized trial. 194 participants will be enrolled in this trial. Participants will be randomized in a 1:1 ratio between the Control Arm vs. the Experimental Arm. Participants, enrolling oncologists, and the statistician will be blinded to trial arm assignment. In the control arm, radiotherapy will consist of 8 Gy in 1 fraction to all sites of oligoprogression, and the experimental arm will consist of SABR treatment to all sites of oligoprogression. Primary Objectives * To assess the impact of SABR, compared to palliative conventional radiotherapy, on Progression-free survival on next line systemic therapy (PFS-NEST), oncologic outcomes, and Quality of Life (QOL) in participants with 1-5 oligoprogressing lesions. * To assess the feasibility of the clinical trial in terms of accrual and success of double-blinding. Secondary Objectives * To evaluate and compare the impact of SABR and palliative radiation therapy on the overall survival (OS), progression free survival (PFS), polymetastatic progression-free survival (PPFS); * To assess and compare the proportion of participants receiving additional radiation therapy and other metastasis-directed interventions during follow-up between both arms; * To compare the impact of SABR and palliative radiation therapy on the time to initiation of the next line of systemic therapy; * To identify and compare the anatomic sites of disease progression between the experimental (SABR)…

This description comes directly from the study's public registry record.

Talk to the study team

Sarah Baker, MD, PhD, FRCPC  ·  604-930-4032  ·  sarah.baker1@bccancer.bc.ca

Narsis Afghari, MSc.  ·  604-675-4100  ·  narsis.afghari@bccancer.bc.ca

Always discuss trial participation with your own doctor first.

Locations (1)

BC Cancer - SurreySurrey, British Columbia, CanadaRecruiting

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Source record: clinicaltrials.gov/study/NCT06918951