Testing Stereotactic Body Radiation Therapy for prostate CA
Official title: Phase II Randomized Trial of 2 Versus 5 Fraction Prostate Stereotactic Ablative Radiotherapy for Intermediate Risk Prostate Cancer
PHASE II RANDOMIZED TRIAL OF 2- VS 5-FRACTION PROSTATE STEREOTACTIC ABLATIVE RADIOTHERAPY
- Phase 2
- 2 groups
- Sites in Surrey and Victoria
- Recruiting
Interventions
- Radiation therapy
Stereotactic Body Radiation Therapy (SBRT)
prostate stereotactic ablative radiotherapy
Canadian Sites (2)
2 of 2 recruiting
- Recruiting
BC Cancer Radiation Oncology
Surrey, British Columbia
- Recruiting
BC Cancer Radiation Oncology
Victoria, British Columbia
Eligibility Criteria
See who this study is looking for19 criteria
The trial’s own eligibility text, word for word from the registry. Only the trial site can say who takes part.
Inclusion
- +Low risk = cT1-T2a,Gleason ≤ 6, and PSA \< 10ng/mL. Intermediate risk = at least one of: cT2b/T2c, PSA 10-20ng/mL, or Gleason 7, but not high risk.
- +• Age 18 or older.
- +Able to provide informed consentInformed consentThe process of being told what taking part involves, then choosing freely.Read more →.
- +Fit for all protocolProtocolThe detailed plan a study must follow.Read more → treatment and follow-upFollow-upContinued check-ins after the treatment part is finished.Read more →.
- +Life Expectancy \> 5 years.
- +Histologically confirmed adenocarcinoma of the prostate, NCCN low or intermediate risk, with biopsy performed within the last 18 months:
- +6 months of Androgen Deprivation Therapy (ADT) is permitted for those with NCCN unfavorable intermediate risk disease (aka high-tier intermediate risk disease), defined as intermediate risk disease with one or more of: two or three intermediate risk features, Gleason 4+3, or ≥50% biopsy cores positive.
- +For those with NCCN unfavorable intermediate risk disease, it is permitted for ADT to have been initiated prior to study enrollmentEnrolmentThe number of participants a study plans to include, or has included.Read more → provided it is possible for radiotherapy to be completed before completion of 6 months of ADT.
- +Prostate volume \<100cc based on imaging or digital rectal examination.
- +PSA within 90 days prior to registration. If ADT is started before registration, then the PSA must have been done no more than 90 day prior to the date of the first ADT injection.
- +CT abdomen and pelvis within the 6 months prior to registration (may be omitted for NCCN low risk participants). If particpant started on ADT prior to registration, CT should be done before first ADT injection.
- +Bone scan within the 6 months prior to of registration (may be omitted for NCCN low risk participants). If particpant started on ADT prior to registration, bone scan should be done before first ADT injection.
- +Must be appropriate for and willing to undergo implantation of prostate fiducial markers and Space OAR Hydrogel.
- +ECOG performance status 0 - 2.
Exclusion
- −Clinical stage cT3 or greater. Gleason score 8 or greater. PSA \> 20ng/mL or greater. NCCN high or very high risk. Pelvic nodal metastases. Distant metastases. Previous malignancy within the last 5 years except basal or squamous cell carcinomas of the skin.
- −Previous pelvic radiotherapy. Any prior active local treatment for prostate cancer. Participants previously on active surveillance are eligible if they continue to meet all other eligibility criteriaEligibility criteriaThe full list of requirements for taking part in a study.Read more →.
- −Unilateral or Bilateral hip prostheses. Medical conditions likely to make radiotherapy inadvisable (e.g., inflammatory bowel disease).
- −Medical condition that would make implantation of fiducial markers or hydrogel rectal spacer unsafe, in the opinion of the treating physician (e.g., pelvic or prostate abscess).
- −Medical condition or implant that prohibits MRI (e.g. pacemaker) Trans-urethral resection of the prostate (TURP), GreenLight Laser or Holmium Laser Prostate procedure within 6 months of radiotherapy.
In plain language
Assembled directly from this trial’s registry record. Every sentence traces to a field below — nothing here is generated or interpreted.
What this study is
This study is testing a treatment for a condition.
Phase 2Phase 2A middle-stage study looking at what a treatment does and watching for side effects.Read more → — a middle-stage study in a few hundred people at most, looking at what the treatment does and watching for side effectsSide effectAn unwanted effect thought to be caused by the treatment itself.Read more →.
From the trial registry
Built from these fields:
- designModule.designInfo.primaryPurpose
- designModule.phases
Who receives what
There are 2 groups in this study.
Group A receives Stereotactic Body Radiation Therapy (SBRT).
Registry label: A: Two-Fraction Prostate SABR
Group B, the comparison group, receives Stereotactic Body Radiation Therapy (SBRT).
Registry label: B: 5-fraction prostate SABR
From the trial registry
Built from these fields:
- armsInterventionsModule.armGroups[].label
- armsInterventionsModule.armGroups[].type
- armsInterventionsModule.armGroups[].interventionNames
How the study is run
Which group you would be placed in is decided by chance, like a coin flip — not by you and not by your doctor.
This study is open-labelOpen-labelEveryone knows which treatment is being given — nothing is hidden.Read more →: everyone knows which treatment is being given, including you and the study team.
From the trial registry
Built from these fields:
- designModule.designInfo.allocation
- designModule.designInfo.maskingInfo.masking
Is there a placebo?
This study does not list a placeboPlaceboA dummy treatment with no active medicine, used for comparison.Read more → group.
One group receives an existing treatment, so the two can be compared.
From the trial registry
Built from these fields:
- armsInterventionsModule.armGroups[].type
- armsInterventionsModule.armGroups[].interventionNames
Who the study is looking for
The study lists a minimum age of 18 years, with no upper limit given.
The study lists male participants only.
The study does not accept healthy volunteersHealthy volunteerSomeone without the condition being studied who takes part anyway.Read more →.
These are the criteria the study lists. Only the trial siteTrial siteA hospital or clinic where a study is actually run.Read more → can decide whether someone can take part.
From the trial registry
Built from these fields:
- eligibilityModule.minimumAge
- eligibilityModule.sex
- eligibilityModule.healthyVolunteers
How big and how long
The study aims to enrol about 100 people.
The study is currently expected to finish around April 2033.
The main measurement is taken over: At Four years after treatment.
From the trial registry
Built from these fields:
- designModule.enrollmentInfo.count
- statusModule.completionDateStruct.date
- outcomesModule.primaryOutcomes[].timeFrame
What the study measures
Freedom from grade 2 or higher toxicity — measured over At Four years after treatment.
From the trial registry
Built from these fields:
- outcomesModule.primaryOutcomes[].measure
- outcomesModule.primaryOutcomes[].timeFrame
Source: NCT06835725 on ClinicalTrials.gov. The full registry text is further down this page — this summary never replaces it.
Not medical advice. What do these terms mean?
What is being tested — in plain terms
About Stereotactic Body Radiation Therapy (SBRT)Radiation
prostate stereotactic ablative radiotherapy
From the trial registry — its own words, unedited.
What a radiation is here: A form of radiotherapy or radiation-based treatment being studied.
Read the full explanation → · in clinical review
Common questions
Answered from this trial’s registry record. Where the record doesn’t say, these answers say so rather than filling the gap.
Am I eligible for this trial?
Only the trial siteTrial siteA hospital or clinic where a study is actually run.Read more → can decide whether someone can take part. Concord cannot make that determination, and neither can any tool that has not examined you.
What the study lists: a minimum age of 18 years.
The full inclusionInclusion criteriaThe things you must have or be for a study to consider you.Read more → and exclusion criteriaExclusion criteriaThe things that would prevent someone from taking part.Read more → are published on this page, exactly as the study team wrote them.
The useful next step is to bring this trial to your doctor. Answering a few questions first gives them something concrete to review.
From the trial registry
- eligibilityModule.minimumAge
- eligibilityModule.eligibilityCriteria
Is there a placebo?
This study does not list a placeboPlaceboA dummy treatment with no active medicine, used for comparison.Read more → group.
One group receives an existing treatment so the two can be compared.
From the trial registry
- armsInterventionsModule.armGroups[].type
Would I know which treatment I am getting?
This study is open-labelOpen-labelEveryone knows which treatment is being given — nothing is hidden.Read more →: everyone knows which treatment is being given, including you and the study team.
Which group you would be placed in is decided by chance, like a coin flip — not by you and not by your doctor.
From the trial registry
- designModule.designInfo.maskingInfo.masking
- designModule.designInfo.allocation
Who can join?
The study lists a minimum age of 18 years, with no upper limit given.
It lists male participants only.
It does not accept healthy volunteersHealthy volunteerSomeone without the condition being studied who takes part anyway.Read more →.
Only the trial siteTrial siteA hospital or clinic where a study is actually run.Read more → can confirm whether a particular person can take part.
From the trial registry
- eligibilityModule.minimumAge
- eligibilityModule.sex
- eligibilityModule.healthyVolunteers
How long would this take?
The study's main measurement is taken over: At Four years after treatment.
The study as a whole is currently expected to finish around 2033-04-30.
How long any one person takes part can differ from the study length. The study team can tell you what the schedule looks like in practice.
From the trial registry
- outcomesModule.primaryOutcomes[].timeFrame
- statusModule.completionDateStruct.date
How many people are taking part?
The study aims to enrol about 100 people.
From the trial registry
- designModule.enrollmentInfo.count
Where is this happening?
This study lists 2 locations, including: Surrey, British Columbia, Canada; Victoria, British Columbia, Canada.
Sites can open and close during a study, so confirm with the team before travelling.
From the trial registry
- trial_locations
About This Trial
Prostate cancer is a common cancer, and a significant cause of cancer death in men. There are many potentially curative treatment options for prostate cancers that have not spread. A relatively recent option is called prostate stereotactic ablative radiotherapy (SABR). SABR is a form of external beam radiotherapy, where patients receive a small number (5-7) of treatments (also called fractions) of radiation delivered in a highly accurate and precise fashion. Standard prostate SABR is generally given in 5 fractions and has been shown to be at least as effective as conventional external beam radiotherapy. Disease control with SABR appears excellent, and it compares favorably to surgery in terms of side effects and quality of life. In theory, reducing the number of fractions from 5 to 2 may improve disease control and reduce side effects, in addition to providing added convenience for patients. Small studies suggest prostate SABR in 2 fractions may be highly effective and well tolerated. However, there is little available data comparing 2 and 5 fraction SABR head to head to tell us which is superior. Two fraction SABR involves delivery of 2 large dose fractions of radiotherapy which could result in significant side effects if proper precautions are not taken. The use of continuous tracking of the prostate gland position during treatment delivery reduces the risk of missing the prostate or overdosing organs near by. Such tracking has been shown to reduce bladder side effects. Also, the use of a rectal spacer placed between the prostate and rectum has been shown to reduce bowel side effects. Also, advanced artificial intelligence (AI)-directed computer applications could potentially improve the targeting of radiation during each treatment. The ADAPT-2 study is a randomized phase II trial comparing standard 5-fraction SABR with an experimental 2-fraction approach in men with intermediate risk prostate cancer. All treatment, whether 5 or 2-fractions, will use continuous prostate tracking (also called triggered imaging) and a rectal spacer (called Space OAR Hydrogel) to minimize side effects. The trial will also evaluate the potential of a new AI-guided dose guidance application to see if it can improve current methods of targeting SABR each day. This aspect of the study will be offline; that is, the AI application will not be used to actually target treatment for the trial patients. Rather, daily targeting of SABR will use standard conventional means, and the AI application will be studied in a simulated fashion to determine it is useful and can be incorporated into workflow. The main goal of the ADAPT-25 study is to compare the long-term side effects and quality of life between 5- and 2-fraction prostate SABR. Secondary goals will be to compare the long-term disease control between 5-and 2-fraction prostate SABR, and to evaluate whether a novel AI-directed dose guidance application can be used to better target SABR by reducing doses to neighboring organs, and whether it can be easily fit into prostate SABR workflow.
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See if this trial could fit youThis page is for informational purposes only and does not constitute medical advice. Clinical trial eligibility can only be determined by the trial site after proper screening. Trial information is sourced from ClinicalTrials.gov and may not reflect the most current status. Always consult your healthcare provider before making decisions about clinical trial participation.