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RecruitingNCT06230666Updated Mar 13, 2024

Single-isocenter SBRT vs. Multiple-isocenter SBRT for Multiple Extracranial Metastases

An interventional study of SBRT in Metastatic Cancer, sponsored by Matthias Guckenberger. Recruiting at 1 site in Switzerland. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2024-03-13.

Sponsored by Matthias Guckenberger · Not applicable, Interventional, and Treatment

From the registry’s dates

  • Started Feb 2024; still recruiting 2 years 7 months later.
Phase
Not applicable
Study type
Interventional
Enrollment
62
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

The goal of this randomized non-inferiority clinical trial is to investigate whether single-isocenter SBRT using one treatment plan is similarly effective as multiple-isocenter SBRT using multiple treatment plans for multiple extracranial metastases. The main question it aims to answer is:

  • whether 1-year freedom from local disease progression at the site of treated metastases after single-isocenter SBRT is non-inferior against multiple-isocenter SBRT at the same prescription doses.

Cancer patients with multiple extracranial distant metastases will be randomly assigned and treated either with single-isocenter SBRT or multiple-isocenter SBRT.

Read the detailed description

Treatment planning of SBRT for multiple metastases usually employs multiple isocenters, one for each target, resulting in multiple treatment plans. Execution of such treatments requires sequential multiple setups and treatment plan verifications. This practice complicates the workflow of SBRT planning and delivery and makes target-by-target treatment lengthy and patient compliance and comfort suboptimal. The investigators hypothesized that single-isocenter SBRT for extracranial multiple metastases is non-inferior in terms of local efficacy as compared to multiple-isocenter SBRT at the same radiation dose prescription.

02

Conditions studied

  • Metastatic Cancer

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03

In context

Neoplasm Metastasis

3,517 studies on the registry are indexed under Neoplasm Metastasis; 885 are open to participants now.

This study's planned enrollment of 62 is above the median of 54 across 2,767 interventional studies indexed under Neoplasm Metastasis.

Browse Neoplasm Metastasis studies →

Lead sponsor

This is the only study on the registry with Matthias Guckenberger as lead sponsor.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Written informed consent according to Swiss law and ICH/GCP regulations signed and dated by the participant and the investigator before any trial specific procedures (Informed Consent Form);
  • Distant extracranial metastases (lung, mediastinal/cervical lymph node, liver, bone including spinal/paraspinal and abdominal/pelvic) from histologically confirmed cancer;
  • Distant metastases confirmed by imaging:

    • CT is required in all cases;
    • MRI is required for spinal and recommended for liver metastases;
    • PET/CT is recommended for tumors showing high uptake of 18F-FDG, 11Ccholine, 68Ga- or 18F-PSMA;
  • At least 2 distant metastases that are amendable to treat with a single isocenter approach according to the judgment of the treating clinician;
  • Patients who are willing and able to comply with scheduled visits, treatment, and other trial procedures.

Exclusion criteria

Exclusion Criteria:

  • Prior radiotherapy for distant metastases if overlapping previous and current treatment plans leads to excessive dose to OARs;
  • Distant metastases with extension into the gastrointestinal tract, skin;
  • Large inter-lesion distance and location of distant metastases in different organs with different motion patterns;
  • Women who are pregnant or breast feeding;
  • Intention to become pregnant during the course of the trial;
  • Lack of safe contraception, defined as: Female participants of childbearing potential, not using and not willing to continue using a medically reliable method of contraception for the entire study duration, such as oral, injectable, or implantable contraceptives, or intrauterine contraceptive devices, or who are not using any other method considered sufficiently reliable by the investigator in individual cases;
  • Known or suspected non-compliance, drug or alcohol abuse;
  • Inability to follow the procedures of the trial, e.g. due to language problems of the participant;
  • Enrolment of the investigator, his/her family members, employees and other dependent persons.

Female participants who underwent hysterectomy and/or bilateral oophorectomy or postmenopausal for longer than 2 years are not considered as being of child bearing potential.

05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
62 participants (estimated)

Study arms

  • Experimental
    Single-isocenter SBRT

    SBRT using a single-isocenter treatment plan

    Radiation: SBRT

  • Active comparator
    Multiple-isocenter SBRT

    SBRT using multiple treatment plans

    Radiation: SBRT

Interventions

  • RadiationSBRT

    Stereotactic Body Radiation Therapy

06

What researchers measure

Primary outcomes

  1. Freedom from local disease progression at the site of treated metastases

    Local control at the site of treated metastases

    Time frame: 1 year post-SBRT

Secondary outcomes

  1. Acute adverse events (AEs)

    AEs occurring during SBRT and within 3 months post-SBRT

    Time frame: 3 months post-SBRT

  2. Late adverse events (AEs)

    AEs occurring 3 months post-SBRT and later

    Time frame: 12 months post-SBRT

  3. Overall survival

    The time from randomization to death from any cause

    Time frame: 1 year post-SBRT

  4. Progression-free survival

    The time from randomization to cancer progression at any site or death, whichever comes first

    Time frame: 1 year post-SBRT

  5. Overall treatment time

    Time needed for setup, verification and beam-on

    Time frame: During the procedure

07

Study locations

1 of 1 sites recruiting
  • Department of Radiation Oncology, University Hospital Zurich
    Zurich, 8091, Switzerland
    Recruiting
08

References and documents

Individual participant data

Plan to share: No — Upon an individual request

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Mar 13, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06230666
Lead sponsor
Matthias Guckenberger
Responsible party
Matthias Guckenberger (Professor, Dr., Chairman, Radiation Oncology Department, University of Zurich) — Sponsor-investigator
First posted
Jan 30, 2024
Start date
Feb 19, 2024
Primary completion
Dec 30, 2026 (estimated)
Completion
Dec 30, 2027 (estimated)
Last update
Mar 13, 2024

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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