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Proton beam boost: new hope for inoperable sarcomas?

NCT ID NCT07173972

Disease control Sponsor: Oslo University Hospital 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 whether a higher dose of proton radiation can better control inoperable soft tissue sarcomas without increasing side effects. Forty adults with these rare tumors will receive targeted radiation over 4 weeks. Researchers will also look at blood and imaging markers to predict who responds best.

What this could mean

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

Active substance
Proton radiotherapy
What this could lead to
If successful, this could offer a more effective radiation option for patients with inoperable soft tissue sarcoma, potentially improving tumor control without increasing side effects.
What could go wrong
This is a small, early-phase (Phase 2) study with only 40 participants, so results may not apply to all patients. The higher radiation dose could also cause unexpected side effects.

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

Phase 2

Tests whether the treatment actually works, and watches for side effects, in a larger group.

Participants

About 40 people

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

Started

Jan 2026

Expected to finish

Nov 2035

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

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

Anyone

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: 1. ≥ 18 years of age at the time of informed consent. 2. Histological diagnosis of soft tissue sarcoma including gastrointestinal stromal tumor (GIST). 3. Measurable disease according to RECIST v1.1. 4. Eastern Cooperative Oncology Group (ECOG) performance status of 0, 1 or 2 5. For patients with metastatic disease a life-expectancy greater than 2 years should be expected. 6. Before patient registration, written informed consent must be given according to national and local regulations. 7. Ability to fill in patient questionnaires and comply with study procedures, including travelling to Bergen or Oslo for Proton Beam radiotherapy. Exclusion Criteria: 1. Patients with a prior or concurrent malignant disease whose natural history or treatment have the potential to interfere with the safety or efficacy assessment of this clinical trial are not eligible. Patients with a history of breast cancer, requiring continued hormonal treatment (e.g. anti-estrogen or an aromatase inhibitor) may be included. Patients with a history of prostate cancer, requiring continued support with luteinizing hormone releasing hormone (LHRH) agonists, with or without androgens, may be included. 2. Previous radiotherapy to the tumor site. 3. Patients with pacemakers and/or implanted defibrillators. 4. Patients not able to give an informed consent or comply with study regulations as deemed by study investigator. 5. Administration of systemic cancer therapy (i.e. chemotherapy, targeted therapy or immune therapy) within 14 days prior to the first fraction of radiotherapy.

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Conditions

The condition(s) this trial relates to.

dermatofibrosarcoma protuberans leiomyosarcoma liposarcoma myxofibrosarcoma pleomorphic liposarcoma pleomorphic rhabdomyosarcoma sarcoma soft tissue sarcoma synovial sarcoma undifferentiated pleomorphic sarcoma

As listed by the trial registrant

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

Leiomyosarcoma (LMS) Liposarcoma Myxofibrosarcoma Pleomorphic liposarcoma Pleomorphic rhabdomyosarcoma Soft tissue sarcoma (STS) Soft tissue sarcoma adult Soft tissue sarcoma of the trunk and extremities Synovial sarcomas Undifferentiated pleomorphic sarcoma (UPS)

How to take part

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

  1. The places running it

    2 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

  • Haukeland University Hospital

    NOT_YET_RECRUITING

    Bergen, Norway

  • Oslo University Hospital

    RECRUITING

    Oslo, Norway

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