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

Combining high dose-rate brachytherapy and stereotactic body radiotherapy for prostate cancer treatment

Official title: Phase 2 Study of High Dose-Rate Brachytherapy and Stereotactic Body Radiotherapy for Intermediate and High Risk Localized Prostate Adenocarcinoma (HYDRA)

Run by Jonsson Comprehensive Cancer Center · NCT04945642 · Data updated 2026-11-12

This study is testing whether combining two types of radiation therapy can improve treatment outcomes for men with prostate cancer.

More Prostate Adenocarcinoma trials

Quick facts

Study typeInterventional
Ages18 Years and up
SexMen only
Enrollment52 (estimated)
SponsorJonsson Comprehensive Cancer Center
Academic / other
Drugs / interventionschemotherapy, radiation
Locations1 site (Los Angeles, California)
StatusRecruiting
StartedAugust 20, 2021
Main results expectedJuly 1, 2027
Study endsJuly 1, 2028
Registry record updatedAugust 20, 2026
Trial IDNCT04945642 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 18 and older with histologically confirmed intermediate- to high-risk prostate adenocarcinoma and no evidence of metastatic disease.

Probably not a fit

Patients with neuroendocrine or small cell carcinoma of the prostate or those with prior invasive malignancies may not benefit from this study.

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 investigates the effectiveness of combining high dose-rate brachytherapy with stereotactic body radiotherapy in treating patients with prostate adenocarcinoma. The approach utilizes internal radiation therapy to deliver radioactive material directly into or near the tumor, alongside highly precise external radiation therapy. The primary objectives include estimating the biochemical progression-free survival at five years and assessing the rates of acute genitourinary and gastrointestinal symptoms following treatment. Secondary objectives focus on long-term patient-reported outcomes and toxicity assessments.

Why it matters

Potential benefit: If successful, this treatment combination could improve survival rates and reduce side effects for patients with prostate adenocarcinoma.

How similar studies have gone: Other studies have shown promising results with similar approaches, indicating potential for success in this trial.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Ability to understand a written informed consent document, and the willingness to sign it
* Age \>= 18 years
* Eastern Cooperative Oncology Group (ECOG) performance status 0-2
* History/physical examination with digital rectal examination of the prostate within 8 weeks prior to registration
* Histologically confirmed intermediate- to high-risk prostate adenocarcinoma (T1c-T3b, PSA \> 10, and/or Gleason score \>= 7
* No evidence of disease beyond the prostate and/or seminal vesicles (i.e., no suspicious pelvic lymph nodes or presence of metastatic disease outside the pelvis)
* Prostate size =\< 60cc
* International Prognostic Scoring System (IPSS) score =\< 15
* Able to safely receive moderate sedation or general anesthesia

Exclusion Criteria:

* Patients with neuroendocrine or small cell carcinoma of the prostate
* Prior or concurrent invasive malignancy (except non-melanomatous skin cancer) or lymphomatous/hematogenous malignancy unless continually disease free for a minimum of 5 years
* Regional lymph node involvement
* Evidence of distant metastases
* Previous radical surgery (prostatectomy) or cryosurgery or high-intensity focused ultrasound for prostate cancer
* Previous pelvic irradiation or prostate brachytherapy
* Previous or concurrent cytotoxic chemotherapy for prostate cancer
* Patients with history of inflammatory bowel disease (i.e., Crohn's disease, ulcerative colitis), high predisposition for radio-toxicity compared to general population (i.e., ataxia telangiectasia), or at risk for major bowel surgery
* Transurethral resection of the prostate (TURP) procedure within 6 months of radiation treatment

Where it's running

  • University of California at Los Angeles / Jonsson Comprehensive Cancer Center
    Los Angeles, California, United States
    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.