Clinical trial Recruiting at 2 sites Interventional Ages 18 and up

Radiation therapy for bone metastases using fewer treatment sessions

Official title: Stereotactic Multiple Fraction Radiotherapy for Non-spine Bone Metastases a Multicentre Prospective, Open Label, Randomised Controlled Phase 3 Non-inferiority Clinical Trial

Run by Kantonsspital Winterthur KSW · NCT05406063 · Data updated 2026-11-12

This study is testing if giving radiation therapy for bone metastases in three sessions instead of five can still help reduce pain for patients.

Quick facts

Study typeInterventional
Ages18 Years and up
SexAll
Enrollment162 (estimated)
SponsorKantonsspital Winterthur KSW
Academic / other
Drugs / interventionsradiation
Locations2 sites (Winterthur, Canton of Zurich and 1 other locations)
StatusRecruiting
StartedJune 1, 2022
Main results expectedMay 31, 2025
Study endsMay 31, 2026
Registry record updatedMay 22, 2025
Trial IDNCT05406063 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates include adults aged 18 and older with a histological diagnosis of malignancy and bone metastases who are experiencing pain.

Probably not a fit

Patients with prior radiotherapy to the treatment site or those with lesions larger than 5cm 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 study investigates the effectiveness of multi-fraction stereotactic body radiation therapy (SBRT) delivered in three treatment sessions compared to the standard five-session approach for patients with bone metastases. The primary focus is on assessing pain response three months after treatment. Participants will receive SBRT, and their pain levels will be monitored to determine if the shorter treatment regimen is equally effective. The study aims to provide a more efficient treatment option for patients suffering from pain due to bone metastases.

Why it matters

Potential benefit: If successful, this approach could reduce the number of treatment sessions needed for patients, potentially improving their quality of life and convenience.

How similar studies have gone: Previous studies have shown promising results with stereotactic body radiation therapy for bone metastases, suggesting that this approach may be effective.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Personally signed and dated written informed consent,
* Histological diagnosis of malignancy,
* Histologically or radiologically diagnosed bone metastasis,
* Age ≥ 18 years
* Pain or under pain control medication

Exclusion Criteria:

* Pregnant or lactating women,
* Women of childbearing potential or sexually active males not willing to use effective contraception while on treatment and 3 months after the end of treatment,
* Inability to follow the procedures of the study, e.g., due to language problems, psychological disorders, dementia, etc.,
* Prior radiotherapy to the intended treatment site,
* Lesions \> 5cm in maximum diameter,
* Prior treatment with radioactive isotopes within 30 days of randomisation,
* Spinal column, hands, feet, or head as intended treatment site,- Fracture at the intended treatment site,
* Surgery required or previous surgery at the intended treatment site
* Instability of the intended treatment site.

Where it's running

  • Kantonsspital Winterthur
    Winterthur, Canton of Zurich, Switzerland
    Recruiting
  • University Hospital Bern
    Bern, Switzerland
    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.