NCT03424850 · Washington University School of Medicine
Safety and Efficacy of 21 Gy, 23 Gy and 25 Gy for High Dose Rate (HDR) Prostate Brachytherapy
What this study is about
The purpose of this research study is to learn more about the outcomes and early and late side effects of treating early stage prostate cancer with high dose rate brachytherapy.
View original scientific description
The purpose of this research study is to learn more about the outcomes and early and late side effects of treating early stage prostate cancer with high dose rate brachytherapy.
Interventions
RADIATION
HDR brachytherapy
* Dose constraints for 21 Gy: * Bladder and rectum: V70 \< 1 cc * Urethra: V115 \< 1 cc * V135: 0% * Dose constraints for 23 Gy: * Bladder and rectum: V65 \< 1 cc * Urethra: V105 \< 1 cc * V125: 0% * Dose constraints for 25 Gy: * Prostate V100 \>90% (\>95% preferred) * Bladder and rectum: V70 \< 1 cc, Dmax \<115% * Urethra: V110 \< 1 cc, Dmax \<120%
Primary outcome measures
Biochemical control experienced by patients with prostate cancer treated with an HDR implant
Time frame: Through 3 years after implant
-Response will be determined by PSA. The Phoenix definition will be used for determining biochemical failure: a rise of 2 ng/mL or more above the PSA nadir
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Histologically or cytologically confirmed diagnosis of early stage prostate cancer.
- Must be considered either low-risk (T1-T2a, Gleason ≤ 6, PSA \< 10 ng/mL) or favorable intermediate-risk (Gleason 3 +4 = 7, percentage of positive biopsy cores \< 50%, no more than one NCCN intermediate risk factor).
- Prior androgen deprivation therapy is allowed and may have been initiated up to 6 months prior to the date of the HDR implant. The complete duration of androgen deprivation therapy can range from 4 months to 36 months provided it has been initiated no more than 6 months prior to the date of the HDR implant.
- At least 18 years of age.
- ECOG performance status ≤ 2
- Able to understand and willing to sign an IRB approved written informed consent document (or that of legally authorized representative, if applicable).
Exclusion criteria
- Prior radiation therapy to the prostate or lower pelvis encompassing the prostate.
- A history of other malignancy ≤ 5 years previous with the exception of basal cell or squamous cell carcinoma of the skin which were treated with local resection only.
- Currently receiving any other investigational agents.
- Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, or cardiac arrhythmia.
- Unable to undergo general, spinal or local anesthesia.
- Prior TURP with a sufficiently large defect that would compromise the integrity of the implant per clinician's assessment.
Where
- St Louis, Missouri
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Mar 11, 2026 · Source of record for eligibility and locations