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Proton beam aims to zap prostate cancer return with fewer side effects

NCT ID NCT00969111

Disease control Sponsor: Proton Collaborative Group Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tests proton radiation therapy for men with prostate cancer that has returned or is at risk of returning after prostate removal surgery. Researchers want to see if this precise type of radiation can control the cancer while causing fewer side effects than standard radiation. About 70 men will receive different doses of proton therapy depending on their risk level.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
proton radiation therapy
What this could lead to
If successful, this could offer a more precise radiation option for prostate cancer patients after surgery, potentially reducing side effects while controlling the disease.
What could go wrong
This is a small, early-phase study with only 70 participants, so results may not apply to everyone. Side effects like bowel or bladder issues are still possible.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 70 people

The number the study aims to enrol. It can still change while the study runs.

Start date

Aug 2009

Expected to finish

Aug 2050

An estimate. End dates often move.

Lead sponsor

A research network

The lead sponsor is a research network or cooperative group.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Male participants only

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Prostate cancer treated primarily with open, laparoscopic or robotically assisted prostatectomy. * Maximum PSA value of 20 ng/ml. Exclusion Criteria: * Evidence of distant metastasis (M1). * Prior systemic chemotherapy for any reason. * Previous irradiation to the pelvis that would compromise the ability to deliver the prescribed study treatment. * Active inflammatory bowel disease (Crohn's disease, diverticulitis or ulcerative colitis) affecting the rectum. (Non-active diverticulitis and Crohn's disease not affecting the rectum are allowed). * Prior or concurrent cancer, other than non-melanomatous skin cancer, unless disease free for at least 5 years. * Taking Saw Palmetto or methotrexate and unable or unwilling to discontinue its use during radiation.

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Conditions

The condition(s) this trial relates to.

prostate cancer

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Prostate cancer

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    6 sites. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Inova Schar Cancer Institute

    RECRUITING

    Fairfax, Virginia, 22031, United States

  • McLaren Proton Therapy Center

    RECRUITING

    Flint, Michigan, 48532, United States

  • Mercy David C. Pratt Cancer Center

    RECRUITING

    St Louis, Missouri, 63141, United States

  • Northwestern Medicine Chicago Proton Center

    RECRUITING

    Warrenville, Illinois, 60555, United States

  • Proton Center of Arkansas

    RECRUITING

    Little Rock, Arkansas, 72205, United States

  • University of Florida Proton Therapy Institute

    RECRUITING

    Jacksonville, Florida, 32206, United States

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