MRI Guided SBRT for Localized Prostate Cancer
Prospective Evaluation of Multi-Parametric MRI Guided Stereotactic Body Radiotherapy (SBRT) for Localized Prostate Cancer
This study utilizes advanced imaging techniques (mpMRI prostate scan) to select and stratify patients for two different radiotherapy regimens based on the presence/absence of identifiable intraprostatic lesions.
In patients without identifiable prostate cancer lesions, SBRT to the prostate in 5 sessions (fractions) will be administered.
In patients with MRI-identified lesion(s), pelvic IMRT in 25 fractions will be administered followed by an SBRT prostate boost while simultaneously treating the prostate cancer lesion(s) to a higher dose in 3 fractions.
Study Overview
Status
Conditions
Detailed Description
Radiotherapy (RT) is considered standard of care treatment for prostate cancer. Conventional RT regimens consist of 8-9 weeks of daily RT. Recent data support the use of hypofractionated RT (5-6 weeks) due to similar disease control in a contracted treatment time. This study combines the benefits of RT dose escalation while shortening the overall RT treatment course.
In this protocol, patients will undergo a pretreatment mpMRI prostate scan and be stratified to two separate SBRT regimens depending on whether prostate lesions are present. For patients without any positive mpMRI lesions, an SBRT monotherapy (36.25 Gy in 5 fractions) approach will be utilized. Patients with an equivocal or positive mpMRI lesion(s), will receive IG-IMRT (45 Gy in 25 fractions) to prostate and seminal vesicle +/- lymph nodes followed by a SBRT whole prostate boost (18 Gy in 3 fractions) with a simultaneously integrated boost (SIB) (21 Gy in 3 fractions) to intraprostatic lesion(s) only.
Patients will be regularly assessed every 3 months for the first 2 years and then every 6 months, indefinitely. Side effects will be monitored using the standardized international prostate symptom score (I-PSS) and Sexual Health Inventory of Men (SHIM) questionnaires at baseline and subsequent follow-up appointments.
Hypothesis: MRI-guided treatment planning and delivery can selectively target high-risk prostate cancer nodules and deliver a higher effective RT dose, to achieve maximal tumor control without increasing toxicity, all in a shortened treatment duration.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
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Illinois
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Chicago, Illinois, United States, 60612
- Rush University Medical Center
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-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Description
Inclusion Criteria:
- Biopsy proven prostate adenocarcinoma within 1 year of randomization
- NCCN Low to High Risk localized prostate cancer
- Zubrod Performance Status 0-1 within 60 days prior to registration
Exclusion Criteria:
- Prior or concurrent invasive malignancy (except non-melanoma skin cancer)
- Regional Lymph Node (N1) involvement
- Distant Metastases (M1) involvement
- History of prior pelvic irradiation (external beam radiotherapy or brachytherapy)
- Prior chemotherapy
- Severe, active co-morbidities (unstable angina and/or CHF; MI; COPD; liver disease; AIDS)
- Acute bacterial or fungal infection requiring IV antibiotics
- Inability to undergo MRI
- Inability to receive fiducial markers
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
|---|---|
|
Experimental: Negative mpMRI Prostate Scan
SBRT to the whole prostate
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Those patients with negative mpMRI prostate scan (PI-RADS 0-2) will receive SBRT (36.25 Gy/5 fractions) to the whole prostate
|
|
Experimental: Positive mpMRI Prostate Scan
IMRT to the prostate + seminal vesicles followed by SBRT boost to the whole prostate with SIB to MRI defined intraprostatic lesions
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Patients with positive or equivocal mpMRI prostate scan (PI-RADS 3-5) will receive IMRT (45 Gy/25 fractions) to the prostate + seminal vesicles +/- lymph nodes followed by SBRT boost (18 Gy/3 fractions) to the whole prostate with simultaneous integrated boost (21 Gy/3 fractions) to MRI defined intraprostatic lesions
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
|---|---|---|
|
Number of Participants With Late Radiation Induced Genitourinary and Gastrointestinal Toxicity
Time Frame: 18 months
|
Number of Participants with late grade 3-5 genitourinary and gastrointestinal toxicity following mpMRI guided radiation treatment.
Late toxicity will be defined as toxicity occurring more than nine months from the start of radiotherapy.
|
18 months
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
|---|---|---|
|
Number of Participants With Acute Radiation Induced Genitourinary Adverse Event
Time Frame: 3 months
|
Adverse acute events are evaluated by the CTEP Active Version of the NCI CTCAE.
The treatment-related attribution includes definitely, probably or possibly related to treatment.
An acute adverse event is defined as the first occurrence of worst severity of the adverse event ≤30 days after the completion of RT.
For each cohort, we will evaluate the acute radiation therapy-related adverse events.
Specifically, we are interested in the percentage of acute GI and GU Grade 3+ adverse events that occur in each arm, which is considered to be similar to the high RT dose arm of RTOG 0126 in terms of RT dose.
For this arm, a reported 1% of patients experienced Grade 3+ GI/GU acute toxicity, with no patient experiencing Grade 4 or 5 toxicities.
If either hypofractionated arm has an acceptable percentage, then that arm will be deemed to have an acceptable adverse event profile.
We will report the percentage for each arm as well as the one-sided 97.5% confidence interval.
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3 months
|
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Biochemical Recurrence
Time Frame: 18 months
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Biochemical (PSA) recurrence is defined according to the proposed new Radiation Therapy Oncology Group/American Society for Therapeutic Radiology and Oncology (RTOG-ASTRO) criteria also known as the RTOG Phoenix definition: an increase of the PSA level at least 2 ng/mL greater than the minimum level reached after therapy (lowest PSA+ 2 criterion).
PSA failure at 1, 2, and 5 years will be estimated for each cohort by the cumulative incidence method.
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18 months
|
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Disease Free-Survival
Time Frame: 18 months
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The disease-free survival duration will be measured from the date of registration to the date of documentation of disease progression or until the date of death from any cause.
DFS at 1, 2, and 5 years will be estimated for each c o h o r t by the Kaplan-Meier method.
Also, 95% confidence intervals will be reported.
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18 months
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Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Dian Wang, MD, PhD, Rush University Medical Center
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- mpMRI SBRT Prostate | 15060207
- 15060207 (Other Identifier: Rush University Medical Center)
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
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