Clinical trial Recruiting at 1 site Interventional Ages 18 and up Men only

High-dose single fraction radiation therapy for prostate cancer

Official title: 24 Gy in One Fraction Urethral-sparing "High-Dose-Rate Like" Stereotactic Body RadioTherapy for Prostate Cancer: a Single-center Non-randomized Prospective Clinical Study (PRO-FAST)

Run by IRCCS San Raffaele · NCT05936736 · Data updated 2026-11-12

This study is testing a high-dose radiation treatment for localized prostate cancer to see if it is safe and effective while protecting the urethra.

Quick facts

Study typeInterventional
Ages18 Years and up
SexMen only
Enrollment70 (estimated)
SponsorIRCCS San Raffaele
Academic / other
Drugs / interventionsRadiation
Locations1 site (Milan, MI)
StatusRecruiting
StartedNovember 8, 2023
Main results expectedMay 2028
Study endsMay 2030
Registry record updatedOctober 27, 2026
Trial IDNCT05936736 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates include adult males diagnosed with localized prostate adenocarcinoma who meet specific imaging and uroflowmetry criteria.

Probably not a fit

Patients with distant metastases or significant urinary flow issues that cannot be corrected may not benefit from this treatment.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial evaluates the safety and efficacy of a single fraction of 24 Gy high-dose-rate radiation therapy that spares the urethra in patients with localized prostate cancer. Participants will undergo staging exams, including PSMA PET/CT scans, and if eligible, will receive treatment after fiducial implantation and imaging simulations. The study aims to assess acute and late toxicity, biochemical control, overall survival, cancer-specific survival, and quality of life through questionnaires in a total of 70 patients. The trial is designed to monitor toxicity levels closely to ensure patient safety.

Why it matters

Potential benefit: If successful, this approach could provide a safer and more effective treatment option for patients with localized prostate cancer.

How similar studies have gone: While similar approaches have been explored, this specific urethral-sparing technique in a single fraction setting is relatively novel and has not been extensively tested.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Histological diagnosis of prostate adenocarcinoma, International Society of Urological Pathology (ISUP) grade groups 1-5
* Patients over 18 years of age
* Signed informed consent
* Negative lymph nodes confirmed by imaging (PSMA PET/CT and/or pelvic MRI with and without contrast medium) where recommended by guidelines (intermediate and high risk patients, according to National Comprehensive Cancer Network (NCCN) guidelines) in the previous 3 months
* Clinical M0 (PSMA PET/CT and/or bone scan and/or pelvic MRI with and without contrast medium in suspected patients and unfavorable intermediate and high risk patients, according to NCCN guidelines), in the previous 3 months
* Acceptable uroflowmetry: peak urine flow index (peak flow preferably ≥ 15 ml/s), post voiding residue (PVR) ≤50 cc. If lower, acceptable if, by carrying out 3 months of neoadjuvant hormone therapy + alpha-lytic for the reduction of prostate volume, uroflowmetry is reset to at least ≥ 12 ml/s.
* PS (ECOG) ≤2
* No previous pelvic radiotherapy
* Other conditions necessary for the correct execution of the proposed treatment (ability to fill in the questionnaires for the evaluation of the Quality of Life EORTC QLQ-C30, EORTC QLQ-PR25, IPSS, IIEF-5, EPIC 26)

Exclusion Criteria:

* Serious systemic diseases
* Psychic or other disorders that may prevent the patient from signing the informed consent
* Previous invasive cancer, except skin cancer (excluding melanoma) unless patient free of disease for at least 3 years (e.g. carcinoma in situ of the oral cavity or bladder)
* Lymph node disease (N1)
* Evidence of distant metastases (M1)
* IPSS questionnaire data \> 20 points
* Uroflowmetry with maximum basal flow ≤ 11 ml/sec and/or PVR \>100 ml
* Concomitant urinary/gastrointestinal inflammatory diseases (e.g. ulcerative colitis, Crohn's disease)
* Overactive bladder
* Impossibility of implantation of fiducials
* Inability or refusal to place bladder catheter for simulation CT and MR
* Inability to perform simulation MRI
* Contraindication for hormonal treatment for patients with unfavorable intermediate, high or very high risk disease
* Non-compliance with dose limits established in the treatment plan

Where it's running

  • San Raffaele Scientific Institute
    Milan, Mi, Italy
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.