Actively Recruiting

Phase Not Applicable
Age: 18Years - 95Years
MALE
Healthy Volunteers
ID05786742

ULTRA-HYPO Fractionated (UHF) Compared to Moderate-HYPO Fractionated (MHF) Prostate IGRT With HDR Brachytherapy BOOST : A Phase 1-2 Study.

Led by CHU de Quebec-Universite Laval · Updated on 2025-09-09

205

Participants Needed

1

Research Sites

391 weeks

Total Duration

On this page

AI-Summary

What this Trial Is About

Researchers are evaluating two types of radiation therapy for men with localized prostate adenocarcinoma: ultra-hypofractionated (UH) therapy and moderately hypofractionated (MH) therapy, combined with image-guided high-dose-rate (HDR) prostate brachytherapy. The study aims to compare the side effects and tolerability of these radiation approaches and assess if UH therapy is not worse than MH therapy in terms of toxicity. The study also involves outlining MRI-visible dominant intra-prostatic lesions and examining variability between radiation oncologists and radiologists. Secondary goals include monitoring biochemical and clinical failure-free survival at 5 and 10 years. The trial includes two treatment groups: one receiving UH radiation therapy delivering 25 Gy in 5 fractions over 7 days, targeting the prostate and the first centimeter of the seminal vesicle; the other receiving MH radiation therapy delivering 37.5 Gy in 15 fractions or 36 Gy in 12 fractions over several weeks. All participants receive HDR brachytherapy with a single 15 Gy fraction under anesthesia, involving catheter and marker placement for precise treatment delivery. Imaging such as TRUS, CT scans, and multiparametric MRI are used for planning and monitoring. Treatment techniques include IMRT, VMAT, or SBRT, with dosimetric optimization and live dose monitoring in some patients. Participants undergo regular evaluations including toxicity assessments using CTCAE version 5, urinary symptom scoring (IPSS), sexual function questionnaires (SHIM), and quality of life surveys (EPIC-26) starting before treatment and continuing up to 5 years post-therapy. Clinical outcomes and biochemical failure rates are also tracked at 5 and 10 years. Safety and side effects are monitored carefully at multiple time points, with imaging and laboratory data collected before and after treatment. The study lasts several years to capture both acute and late effects of the therapies.

CONDITIONS

Brief Title

Ultra Hypofractionnated Radiotherapy With HDR Brachytherapy Boost.

Who Can Participate

Age: 18Years - 95Years
MALE
Healthy Volunteers

Eligibility Criteria

Eligible

You may qualify if you...

  • Biopsy proven Prostate adenocarcinoma
  • Clinical stage T1c or T2
  • Stage Nx or N0
  • Stage Mx or M0
  • PSA less than 20 ng/ml
  • Gleason Score 6 or 7
  • Ability to sign a written consent
Not Eligible

You will not qualify if you...

  • Age under 18 years
  • Clinical stage T3 or T4
  • Stage N1
  • Stage M1
  • PSA greater than 20 ng/ml
  • Gleason Score 8 to 10
  • IPSS Score greater than 20 despite alpha-blocking medication
  • Prior pelvic radiotherapy
  • History of active collagenosis (Lupus, Sclerodermia, Dermatomyosis)
  • Past history of Inflammatory Bowel Disease
  • Bilateral hip prosthesis

AI-Screening

AI-Powered Screening

Complete this quick 3-step screening to check your eligibility

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Your Study Journey

Screening

Duration - 2 to 4 weeks

Participants are screened for eligibility to participate in the trial.

1 visit (in-person) for eligibility assessment

Implantation and Planning

Duration - 1 to 2 days

Participants undergo implantation of prostate brachytherapy catheters under anesthesia, followed by imaging and treatment planning before radiotherapy.

1 to 2 visits including implantation and planning imaging

Treatment

Duration - 1 to 3 weeks depending on treatment arm

Participants receive either ultra hypofractionated or moderate hypofractionated radiotherapy combined with a high-dose-rate brachytherapy boost to the prostate and seminal vesicles.

5 radiotherapy fractions over approximately 7 days or 12 to 15 daily fractions over 2 to 3 weeks

Follow-up Monitoring

Duration - Up to 5 years post-therapy

Participants are monitored for toxicity, urinary symptoms, sexual function, and quality of life through regular assessments up to 5 years post-treatment.

Visits at 3 months, 6 months, 1 year, then yearly up to 5 years

Trial Site Locations

Total: 1 location

1

CHUdeQuebec

Québec, Canada, G1R 2J6

Actively Recruiting

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Research Team

A

Andre-Guy Martin

J

Josee Allard

How is the study designed?

Study Type

INTERVENTIONAL

Masking

NONE

Allocation

NON_RANDOMIZED

Model

PARALLEL

Primary Purpose

TREATMENT

Number of Arms

2

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