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Study identifier: NCT05708235 Synced from ClinicalTrials.gov · July 28, 2026
● Recruiting

A PoC Study to Evaluate Treatments' Efficacy by Monitoring MRD Using ctDNA in HR-positive/HER2-negative EBC Population

Condition: Breast Cancer  ·  Sponsor: MedSIR

PhasePhase 2
Planned participants976
Who can joinAll sexes, 18 Years to no upper limit
Healthy volunteersNo

About this study

This trial is a multicenter, open-label, non-comparative, phase II, biomarker-driven adjuvant treatment study involving the periodic collection and analysis of blood samples from patients with HR-positive/HER2-negative early-stage BC at higher risk of relapse, who have undergone surgery within the previous five years, with no evidence of locoregional, contralateral, or distant disease. The study design is composed by an initial pre-screening phase, a molecular follow-up phase (ctDNA surveillance phase), and an interventional therapeutic phase (treatment phase). After informed consent is obtained, a total of 976 eligible patients will enter a ctDNA surveillance in which primary tumor tissue and matched normal blood will be collected from each patient to obtain a patient-specific somatic mutations panel (tumor signature). At the event of ctDNA positivity, patients will be screened to enter the treatment phase of the study. Upon confirmed eligibility, a total of 40 patients will be allocated in one of the following trial's arms adopting a sequential recruitment strategy: Arm A: Control Arm (N=10) Arm B: Experimental Arm with giredestrant (N=10) Arm C: Experimental Arm with giredestrant + abemaciclib (N=10) Arm D: Experimental Arm with giredestrant + inavolisib (N=10) If the strategy of ctDNA monitoring enables physicians to identify patients at high risk of relapse and assess whether treatment at molecular relapse can improve outcome, new cohorts may be added to the study.

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

Talk to the study team

Medsir  ·  +34 932 214 135  ·  contact.trials@medsir.org

Always discuss trial participation with your own doctor first.

Locations (41)

Complejo Hospitalario Universitario A Coruña (CHUAC)A Coruña, SpainRecruiting
Hospital General Universitario Dr. BalmisAlicante, SpainRecruiting
Hospital Marina Salud de DeniaAlicante, SpainRecruiting
Hospital Virgen de los LiriosAlicante, SpainRecruiting
Fundació AlthaiaBarcelona, SpainRecruiting
Hospital Clínic i Provincial de BarcelonaBarcelona, SpainRecruiting
Hospital Universitari DexeusBarcelona, SpainRecruiting
Hospital Universitario de BasurtoBilbao, SpainRecruiting
Hospital Provincial de CastellónCastellon, SpainRecruiting
Hospital Universitario Reina SofíaCórdoba, SpainRecruiting
Hospital del VinalopóElche, SpainRecruiting
Institut Català d' Oncologia Girona (ICO)Girona, SpainRecruiting

+ 29 more locations — full list on the registry record.

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Source record: clinicaltrials.gov/study/NCT05708235