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|ClinicalTrials.gov Identifier: NCT00913939|
Recruitment Status : Recruiting
First Posted : June 4, 2009
Last Update Posted : October 6, 2021
This pilot study initiates a research program testing the early technical and clinical performance of a novel procedure for MRI-guided high-dose-rate (HDR) prostate brachytherapy. Testing will proceed in two cohorts of patients. In Arm 1, patients with locally recurrent prostate cancer after radiotherapy will receive tumor-targeted salvage HDR brachytherapy. Arm 1 of the study will be coordinated and closely integrated with a separate concurrent study of MRI-guided prostate biopsy, which will be performed prior to accrual to Arm 1 of this trial (UHN 05-0641-C). In arm 2, patients with locally advanced prostate cancer will receive a boost of prostate-targeted HDR brachytherapy during external beam radiotherapy.
This technique will be prospectively evaluated in up to 100 patients. Preliminary data acquired in this pilot study will determine the technical limits of MRI guided HDR brachytherapy and will be critical for the judicious conduct of a subsequent phase II clinical trial.
This proposal is innovative in two fundamental ways: MRI-guidance, and specific tumor targeting for HDR brachytherapy. Successful completion of this study will further individualize local therapy, not only for the benefit of the proportion of cancer patients for whom initial radiotherapeutic interventions have failed, but also provide valuable technical and clinical validation that these novel image-guided (IG) approaches are clinically feasible and could be applied more broadly in prostate cancer therapy.
|Condition or disease||Intervention/treatment||Phase|
|Patients With Prostate Cancer||Procedure: MRI Guided Needles to deliver HDR Brachytherapy||Not Applicable|
Two hundred and nineteen thousand new cases of prostate cancer have been projected in the Unites States for 2007, with external beam radiotherapy (EBRT) constituting the mainstay of local therapy for an increasing proportion of newly diagnosed patients. Despite improvements in the delivery and reduction in associated toxicity of external beam radiotherapy, local persistence or recurrence of disease remains prevalent in 25-51% of patients. Local disease after EBRT is a risk factor for subsequent metastatic progression and prostate cancer-specific mortality, and is a cause of morbidity including hematuria, obstructive uropathy, and chronic pain. Given its prevalence, and the lack of satisfactory local salvage treatments, fear of prostate cancer recurrence has been shown to impose a substantial burden of suffering in patients.
Stereotactic needle placement under MRI-guidance enables two critical steps in tumor-targeted brachytherapy: 1) directly guiding brachytherapy catheters to sites of tumor recurrence, and 2) permitting treatment planning and delivery to be based on 3D MRI images. MRI-based HDR brachytherapy will precisely identify the location of brachytherapy catheters relative to the target volumes and adjacent normal structures at risk of radiation injury, obviating the need for invasive saturation (24-100) mapping biopsies.
This study will build the evidence supporting the concept of MRI-guidance and tumor-targeted HDR brachytherapy in the management of prostate cancer. This trial will strive to demonstrate improvements in technical performance under MRI-guidance, while exploring a novel paradigm of patient-specific modulation of dose intensity based on regions of tumor burden.
|Study Type :||Interventional (Clinical Trial)|
|Estimated Enrollment :||400 participants|
|Intervention Model:||Parallel Assignment|
|Masking:||None (Open Label)|
|Official Title:||MRI-Guided HDR Brachytherapy for Prostate Cancer|
|Study Start Date :||May 2009|
|Estimated Primary Completion Date :||May 2025|
|Estimated Study Completion Date :||May 2025|
Active Comparator: 1: Salvage After EBRT
Patients with locally recurrent prostate cancer after radiotherapy will receive tumor-targeted salvage HDR brachytherapy. Arm 1 of the study will be coordinated and closely integrated with a separate concurrent study of MRI-guided prostate biopsy, which will be performed prior to accrual to Arm 1 of this trial (UHN 05-0641-C).
Procedure: MRI Guided Needles to deliver HDR Brachytherapy
Patients in this arm will receive two fractions (treatments) of brachytherapy over 14 days (+/- 7 days).
Active Comparator: 2: Boost to EBRT
Patients with locally advanced prostate cancer will receive a boost of prostate-targeted HDR brachytherapy during external beam radiotherapy.
Procedure: MRI Guided Needles to deliver HDR Brachytherapy
Patients in this arm will receive 2 fractions (treatments) of brachytherapy before the start of RT, and 4-5 weeks towards the end of EBRT.
- To determine if MRI-guided HDR brachytherapy is associated with favorable measures of technical performance. [ Time Frame: 5 years ]
- determine if prostate targeted & MRI-guided HDR BT is associated with favorable preliminary measures of clinical performance as boost to EBRT;if tumor-targeted & MRI-guided HDR BT is associated with favorable preliminary measures of clinical performance [ Time Frame: 5 years ]
- determine dose-response relationships for salvage brachytherapy with a 20% escalation in dose. [ Time Frame: 5 years ]
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00913939
|Contact: Peter Chung, MB ChB||416 946 4501 ext 6522||Peter.email@example.com|
|Contact: Cynthia Ménard, MD||514 890-8000 ext firstname.lastname@example.org|
|University Health Network, Princess Margaret Hospital||Recruiting|
|Toronto, Ontario, Canada, M5G 2M9|
|Contact: Peter Chung, MB ChB 416 946 4501 ext 6522 Peter.Chung@rmp.uhn.on.ca|
|Principal Investigator:||Peter Chung, MB ChB||University Health Network, Princess Margaret Hospital|