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.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 420 (estimated) |
| Sponsor | Odense University Hospital Academic / other |
| Drugs / interventions | radiation |
| Locations | 11 sites (Aalborg and 10 other locations) |
| Status | Recruiting |
| Started | April 2, 2025 |
| Main results expected | April 2029 |
| Study ends | April 2029 |
| Registry record updated | February 20, 2026 |
| Trial ID | NCT06877949 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
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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
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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
- Principal investigator: Malene G Hildebrandt, MD, Professor — Odense University Hospital
- Study coordinator: Malene G Hildebrandt, MD, Professor
- Email: malene.grubbe.hildebrandt@rsyd.dk
- Phone: 0045 30171888
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.