Clinical trial Recruiting at 9 sites Interventional Ages 18 and up

Comparing FDG-PET/CT and CT for Monitoring Metastatic Breast Cancer

Official title: FDG-PET/CT Versus Conventional CT for Response Monitoring in Metastatic Breast Cancer: A Multicenter Randomized Clinical Trial (MONITOR-RCT)

Run by Odense University Hospital · NCT06877949 · Data updated 2026-11-12

This study is testing if a special type of imaging called FDG-PET/CT can find problems in metastatic breast cancer patients sooner than regular CT scans, so they can start new treatments faster.

More Metastatic Breast Cancer trials

Quick facts

Study typeInterventional
Ages18 Years and up
SexAll
Enrollment420 (estimated)
SponsorOdense University Hospital
Academic / other
Drugs / interventionsradiation
Locations11 sites (Aalborg and 10 other locations)
StatusRecruiting
StartedApril 2, 2025
Main results expectedApril 2029
Study endsApril 2029
Registry record updatedFebruary 20, 2026
Trial IDNCT06877949 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates include adults aged 18 and older with biopsy-verified metastatic breast cancer who are eligible for first-line systemic treatment.

Probably not a fit

Patients with non-metastatic breast cancer or those not eligible for systemic treatment 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 clinical trial investigates the effectiveness of FDG-PET/CT compared to conventional CT for monitoring patients with metastatic breast cancer. The goal is to determine if FDG-PET/CT can detect disease progression earlier, allowing for timely initiation of second-line therapies. The study involves a randomized, parallel group design where participants will receive either FDG-PET/CT or standard CT monitoring. The findings aim to provide robust evidence on the potential survival benefits of using FDG-PET/CT in this patient population.

Why it matters

Potential benefit: If successful, this study could lead to improved survival rates for patients with metastatic breast cancer by enabling earlier treatment interventions.

How similar studies have gone: Previous studies have suggested improved sensitivity of FDG-PET/CT over conventional imaging, but this approach is being rigorously tested in a prospective randomized setting for the first time.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Women and men aged ≥18 years
2. Diagnosis of distant relapsed MBC (biopsy-verified) or de novo breast cancer. In patients with distant relapsed MBC, biopsy verification from a distant metastasis is required. In patients with de novo MBC, biopsy verification of primary tumor and diagnostic imaging with distant metastasis with a typical pattern of MBC is required.
3. Considered eligible for first-line systemic treatment
4. Considered eligible for continuous treatment monitoring by scans.
5. Signed informed consent
6. Participants must have the ability to read and understand the following languages based on their country of participation: in Denmark, patients must be able to read and understand Danish; in Italy, they must be able to read and understand Italian or English; and in Germany, they must be able to read and understand German or English.

In case of patients for whom it is necessary to start first-line systemic treatment while still waiting for the evaluation of the biopsy, it is allowed to include the patients, as long as the other criteria are fulfilled and the biopsy is made or planned. In case verification by biopsy fails, the patients will leave the trial (cf. 4c). We expect that up to 3% of the patients included will start first-line systemic treatment prior to evaluation of the biopsy

Exclusion Criteria:

1. Pregnant or lactating women
2. Ongoing oncological treatment for another cancer
3. Exclusively brain metastasis
4. Allergy to FDG

Where it's running

  • Aalborg University Hospital
    Aalborg, Denmark
    Recruiting
  • Aarhus University Hospital
    Aarhus, Denmark
    Recruiting
  • Rigshospitalet
    Copenhagen, Denmark
    Recruiting
  • Esbjerg and Grindsted Hospital
    Esbjerg, Denmark
    Recruiting
  • Herlev and Gentofte Hospital
    Herlev, Denmark
    Recruiting
  • Odense University Hospital
    Odense, Denmark
    Recruiting
Show 5 more locations
  • Hospital of Southern Jutland
    Sønderborg, Denmark
    Recruiting
  • Lille Baelt Hospital
    Vejle, Denmark
    Recruiting
  • Irccs Azienda Ospedaliero - Universitario Di Bologna
    Bologna, Italy
    Recruiting
  • Klinikum Der Technischen Universität München
    München, Germany
    Not yet recruiting
  • Humanitas Research Hospital
    Milan, Italy
    Not yet 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.