An interventional study of IMRT to 45 Gy; prostate bed proton boost of 21.6 CGE and Proton (prostate bed) to 70.2 CGE in Prostate Cancer, sponsored by Proton Collaborative Group. Recruiting at 6 sites in United States. Open to male participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-06-17.
Sponsored by Proton Collaborative Group · Not applicable, Interventional, and Treatment
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Among 3,595 studies in Prostatic Neoplasms with a site in United States — 607 open to participants now, 977 under way, 101 of them phase 3. Prostatic Neoplasms · United States.
Among the 3,595 studies in Prostatic Neoplasms with a site in United States, this one is the 1,156th largest by planned enrollment of the 3,023 interventional ones that give a count, is one of 127 that started in 2009, is one of 764 with no phase, reaches primary completion later than 922 of the 971 other live ones, and was the 1,017th registered.
7,047 studies on the registry are indexed under Prostatic Neoplasms; 1,579 are open to participants now.
Browse Prostatic Neoplasms studies →607 of the 3,595 studies in Prostatic Neoplasms with a site in United States are open now. Recruiting first, the newest first:
City of Hope Medical Center · Sites in United States
Ages 40–80 · Men only
Fred Hutchinson Cancer Center · Sites in United States
Ages 18+ · Men only
University of Michigan Rogel Cancer Center · Sites in United States
Ages 50–75 · Men only · Healthy volunteers
Clinton Bahler · Sites in United States
Ages 18+ · Men only
University of Miami · Sites in United States
Ages 18+ · Men only
A study can be open while its sites in United States have not opened yet or have stopped. Only those recruiting at a site in United States →
Of the 1,228 Prostatic Neoplasms studies recruiting now, 927 (75%) set no upper age limit and 76 (6%) stop at 75 or younger; 67 take children under 18; 82 take healthy volunteers.
This study: 18 Years and older · male · no healthy volunteers.
The full table on the hub →This tab as a report to print or save as PDF → With an account.
3,595 studies; the count open now beside each. This study's row is marked.
A study in two phases is counted once above. Listed by phase, each with its combined phases: Phase 1 898 · Phase 2 1,383 · Phase 3 321 · Phase 4 50
First in 1988; this study’s year is marked. 127 started in 2009.
By drug class, each counting the studies that test any of its medicines:
This study's planned enrollment of 70 is above the median of 60 across 5,349 interventional studies indexed under Prostatic Neoplasms.
Median enrollment 48 across the 3,023 interventional studies, 157 across the 477 observational. Of the 2,355 that completed or were terminated, 997 (42%) have results posted.
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921 of 3,595 have an industry lead sponsor. The 10 most frequent:
Proton Collaborative Group is the lead sponsor of 10 studies on the registry; 6 are open to participants now.
Proton Collaborative Group has 4 studies filed under Prostatic Neoplasms — fewer than ten, so there is no comparison to draw.
338 of the studies in Prostatic Neoplasms with a site in United States that are under way reach primary completion within a year, 25 of them phase 3. Phase 3 first, then by date:
| Study | Primary completion |
|---|---|
| NCT03348670Phase 3Han Xu, M.D., Ph.D., FAPCR, Sponsor-Investigator, IRB ChairPharmacogenomics IND Commercial SNP Clinical Study - Abiraterone and Single Nucleotide Polymorphisms | 2026-11-18 |
| NCT03767244Phase 3Janssen Research & Development, LLCA Study of Apalutamide in Participants With High-Risk, Localized or Locally Advanced Prostate Cancer Who Are Candidates for Radical Prostatectomy | 2026-12-01 |
| NCT06970847Phase 3Clarity Pharmaceuticals Ltd64Cu-SAR-bisPSMA Positron Emission Tomography: A Phase 3 Study of Participants With Biochemical Recurrence of Prostate Cancer | 2026-12-31 |
| NCT02446405Phase 3University of SydneyEnzalutamide in First Line Androgen Deprivation Therapy for Metastatic Prostate Cancer | 2026-12-31 |
| NCT07427043Phase 3Brigham and Women's HospitalRobotic Opioid-free Prostatectomy Enhanced Strategy (ROPES) | 2026-12-31 |
Add all 338 to your calendar (.ics) → With an account.
Among the 3,595 studies in Prostatic Neoplasms with a site in United States, from their registry updates:
This tab as a report to print or save as PDF → With an account.
The purpose of this study is to see what effects, good and/or bad, proton radiation, and/or conventional radiation and hormonal therapy (if applicable), has on prostate cancer that has already returned or the risk of prostate cancer returning.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.
Metastases
Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Proton to 66.6 CGE
Radiation: Proton to 66.6 CGE
IMRT to 45 Gy; prostate bed proton boost of 21.6 CGE
Radiation: IMRT to 45 Gy; prostate bed proton boost of 21.6 CGE
Proton to 70.2 CGE
Radiation: Proton (prostate bed) to 70.2 CGE
IMRT to 45 Gy; proton boost to prostate bed to 25.2 CGE
Radiation: IMRT to 45 Gy; proton boost to prostate bed to 25.2 CGE
Postop High Risk
Salvage Non-High Risk
Salvage High Risk
Post-Op Non High Risk
The treatment-related rate of acute grade 3 gastrointestinal and genitourinary toxicity following treatment with proton based radiation therapy.
Time frame: 6 months after the end of radiation therapy
Collect and analyze quality of life, treatment-related morbidity, disease control and survival outcome parameters
Time frame: After radiation: every 6 months for 3 years, then annually for 20 years
The record gives a start of Aug 2009, a primary completion of Aug 2031 and a completion of Aug 2050. It does not say whether these dates are actual or estimated.
How these figures are worked out, and which studies are left out of them.
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Proton Collaborative Group