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Study identifier: NCT04985266 Synced from ClinicalTrials.gov · July 28, 2026
● Recruiting

A Trial of Early Detection of Molecular Relapse With Circulating Tumour DNA Tracking and Treatment With Palbociclib Plus Fulvestrant Versus Standard Endocrine Therapy in Patients With ER Positive HER2 Negative Breast Cancer

Condition: ER+ Breast Cancer · HER2-negative Breast Cancer  ·  Sponsor: Royal Marsden NHS Foundation Trust

PhasePhase 2
Planned participants1100
Who can joinAll sexes, 18 Years to no upper limit
Healthy volunteersNo

About this study

Detection of molecular relapse with circulating tumour DNA analysis can identify which patients with ER positive breast cancer are relapsing on adjuvant endocrine therapy. This trial will aim to demonstrate that palbociclib and fulvestrant, can defer or prevent relapse in patients with ctDNA detected molecular relapse. The TRAK-ER trial will have two phases, a ctDNA surveillance phase and a randomised therapy trial in patients with positive ctDNA. The TRAK-ER trial will establish a ctDNA screening programme for patients with ER positive breast cancer receiving adjuvant endocrine therapy with at least a further three years of standard adjuvant endocrine therapy planned. Patients recruited into the TRAK-ER study will have high-risk clinical features to identify patients at higher risk of future relapse. ctDNA assays will be used to identify which people are at very high risk of relapse (i.e. those with a positive ctDNA result), and randomise this high risk population between standard endocrine therapy versus palbociclib plus fulvestrant for up to two years.

This description comes directly from the study's public registry record.

Talk to the study team

Project Manager  ·  020 7808 2887  ·  trak-er@rmh.nhs.uk

Always discuss trial participation with your own doctor first.

Locations (49)

Institut de Cancérologie de l'OuestAngers, FranceRecruiting
Centre Hospitalier Annecy Genevois_Site d'AnnecyAnnecy, FranceRecruiting
Institut du Cancer Avignon Sainte CatherineAvignon, FranceRecruiting
Centre Hospitalier Simone Veil de BloisBlois, FranceRecruiting
Institut BergoniéBordeaux, FranceRecruiting
Centre Jean PerrinClermont-Ferrand, FranceRecruiting
Centre George François LeclercDijon, FranceRecruiting
Groupe Hospitalier Mutualiste de GrenobleGrenoble, FranceRecruiting
Clinique ChénieuxLimoges, FranceRecruiting
Centre Hospitalier Universitaire de LimogesLimoges, FranceRecruiting
Centre Léon BérardLyon, FranceRecruiting
Institut Paoli CalmettesMarseille, FranceRecruiting

+ 37 more locations — full list on the registry record.

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Source record: clinicaltrials.gov/study/NCT04985266