Stereotactic MRI-Guided Radiation for Localized Prostate Cancer

NCT ID: NCT03588819

Last Updated: 2022-06-14

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

UNKNOWN

Clinical Phase

NA

Total Enrollment

30 participants

Study Classification

INTERVENTIONAL

Study Start Date

2018-04-23

Study Completion Date

2024-04-23

Brief Summary

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This single arm, prospective study will determine the prostate-specific quality of life (QOL) of patients undergoing undergoing a 2 fraction MRI-guided stereotactic ablative body radiation (SABR) protocol. We propose prescribing a prostate dose of 26 Gy in 2 fractions and a dose of up to 32 Gy to the dominant intraprostatic lesion (DIL) in 2 fractions over one week.

Detailed Description

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Stereotactic Ablative Body Radiation Two weekly fractions of:

13 Gy to whole prostate +/- seminal vesicles AND Up to 16 Gy simultaneous boost to dominant MRI nodule

Treatment Delivery and Quality Assurance Treatment will be delivered on treatment units equipped with with volumetric arc therapy and hexapod couches. Only photons with megavoltage energies of 6 MV will be used. Cone-beam CT imaging will be performed using the implanted fiducials to set up each treatment. Imaging after each fraction of radiation will be performed and the shifts in prostate positioning (as measured by displacement of gold seed fiducials) will be measured and recorded. Also, the total treatment time for each fraction of radiotherapy will be recorded.

Patient Assessments / Follow-up Time zero will be the start of radiotherapy. Baseline and follow-up parameters are as listed in Appendix A. Baseline rectal and urinary function will be recorded. Acute toxicities will be assessed at weeks 1, 4, and 13 and late toxicities will be assessed at month 6 and every 6 months until year 5 using the Common Terminology Criteria Adverse Events, version 4.0. Bloodwork (PSA and testosterone), will be performed at months 3, 6 and every 6 months until year 5. QOL using the Expanded Prostate Cancer Index Composite (EPIC) will be obtained at baseline, weeks 1, 4, 13, month 6 and every 6 months until year 5.

Conditions

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Prostate Cancer

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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2-fraction SABR

Group Type EXPERIMENTAL

SABR

Intervention Type RADIATION

26 Gy in 2 fractions to the prostate and DIL dose of up to 32 Gy in 2 fractions of MR-guided SABR delivered 1 week apart

Interventions

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SABR

26 Gy in 2 fractions to the prostate and DIL dose of up to 32 Gy in 2 fractions of MR-guided SABR delivered 1 week apart

Intervention Type RADIATION

Eligibility Criteria

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Inclusion Criteria

1. Informed consent obtained
2. Men \>18 years
3. Histologically confirmed prostate adenocarcinoma (centrally reviewed)
4. Favorable risk prostate cancer, defined as clinical stage T1-2c, Gleason Sum less than or equal to 7, and PSA less than or equal to 20 ng/mL (patients can have only one of T2c, Gleason Sum 7 and PSA 10-20 ng/ml)

Exclusion Criteria

1. Androgen deprivation therapy (LHRH-agonists or antiandrogens) \> 6 mo
2. Prior pelvic radiotherapy
3. Anticoagulation medication (if unsafe to discontinue for gold seed insertion)
4. Diagnosis of bleeding diathesis
5. Large prostate (\>90cm3) on imaging
6. Immunosuppressive medications
7. Inflammatory bowel disease
8. Presence of a hip prosthesis
9. Contraindications to having MRI
Minimum Eligible Age

18 Years

Eligible Sex

MALE

Accepts Healthy Volunteers

No

Sponsors

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Sunnybrook Health Sciences Centre

OTHER

Sponsor Role lead

Responsible Party

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Andrew Loblaw

GU Radiation Oncology Team Lead

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Andrew Loblaw, MD, FRCPC

Role: PRINCIPAL_INVESTIGATOR

Sunnybrook Health Sciences Centre, University of Toronto

Locations

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Sunnybrook Health Sciences Centre

Toronto, Ontario, Canada

Site Status

Countries

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Canada

References

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Ong WL, Cheung P, Chung H, Chu W, Detsky J, Liu S, Morton G, Szumacher E, Tseng CL, Vesprini D, Davidson M, Ravi A, McGuffin M, Zhang L, Mamedov A, Deabreu A, Kulasingham-Poon M, Loblaw A. To Boost or Not to Boost: Pooled Analyses From 2-Fraction SABR Trials for Localized Prostate Cancer. Int J Radiat Oncol Biol Phys. 2023 Dec 1;117(5):1153-1162. doi: 10.1016/j.ijrobp.2023.06.250. Epub 2023 Jul 5.

Reference Type DERIVED
PMID: 37419394 (View on PubMed)

Other Identifiers

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014-2018

Identifier Type: -

Identifier Source: org_study_id

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