RecruitingNCT07180693

Breast Cancer RElapsed in Patients Treated With Adjuvant CDK4/6 Inhibitors:

Breast Cancer RElapsed in Patients Treated With Adjuvant CDK4/6 Inhibitors: Evaluation in the Real-world Setting


Sponsor

European Institute of Oncology

Enrollment

750 participants

Start Date

Sep 29, 2025

Study Type

OBSERVATIONAL

Conditions

Summary

This is a multicenter observational study with both retrospective and prospective phase, designed to evaluate the clinico-pathologic characteristics and outcomes of patients with HR+/HER2- EBC at high risk of recurrence treated with ribociclib or abemaciclib in combination with ET in the adjuvant setting.


Eligibility

Min Age: 18 Years

Inclusion Criteria6

  • Female (regardless of menopausal status) or male ≥18 years of age;
  • The patient has confirmed HR+, HER2-, early-stage resected invasive breast cancer candidate to adjuvant CDK4/6 inhibitors (abemaciclib or ribociclib);
  • ER and PgR positivity is defined as evidence of immunohistochemical staining ≥ 1% according to ASCO/CAP recommendations; HER2 negativity is defined as expression of the membrane protein in immunohistochemistry 0 or 1+ or with a 2+ in situ hybridization (ISH) test negative as per ASCO/CAP recommendations;
  • Patients who are initiating or have initiated adjuvant treatment with a CDK4/6 inhibitor (abemaciclib or ribociclib) in combination with endocrine therapy (ET). Treatment must have started on or after January 1, 2021.
  • Eastern Cooperative Oncology Group (ECOG) performance status ≤ 2;
  • Consent to data treatment according to the local regulation.

Exclusion Criteria5

  • Current participation in any other HR+/HER2- EBC study with any investigational products;
  • Patients who have already received adjuvant treatment with a CDK4/6 inhibitor as part of a clinical trial;
  • Patients unable to comply with the requirements of the study or who, in the judge of the study physician, should not be included in the study;
  • Patients with a history of previous BC, with the exception of Ductal carcinoma in situ (DCIS) treated by locoregional therapy alone ≥5 years ago;
  • Patients with a history of any other cancer (except non-melanoma skin cancer or carcinoma in situ of the cervix), unless in complete remission with no therapy for a minimum of 5 years from the index date, will be excluded, as well.

Locations(18)

ASST Papa Giovanni XXIII

Bergamo, Italy, Italy

ASST Spedali Civili di Brescia

Brescia, Italy, Italy

P.O. Antonio Perrino - ASL Brindisi

Brindisi, Italy, Italy

ASST Ospedale Maggiore di Crema

Crema, Italy, Italy

ASST Lecco - PO Alessandro Manzoni

Lecco, Italy, Italy

Asst Ovest Milanese

Legnano, Italy, Italy

IRCCS Ospedale San Raffaele

Milan, Italy, Italy

Fondazione IRCCS Istituto Nazionale dei Tumori di Milano

Milan, Italy, Italy

European Institute of Oncology

Milan, Italy, Italy

PO Luigi Sacco - ASST Fatebenefratelli Sacco

Milan, Italy, Italy

Azienda Ospedaliero-Universitaria di Modena

Modena, Italy, Italy

Fondazione IRCCS San Gerardo dei Tintori

Monza, Italy, Italy

Istituto Nazionale Tumori IRCCS Fondazione G. Pascale

Napoli, Italy, Italy

ICS Maugeri IRCCS

Pavia, Italy, Italy

Policlinico San Matteo

Pavia, Italy, Italy

Azienda USL IRCCS di Reggio Emilia

Reggio Emilia, Italy, Italy

Fondazione Policlinico Universitario Agostino Gemelli IRCCS

Roma, Italy, Italy

Ospedale Isola Tiberina - Gemelli Isola

Roma, Italy, Italy

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NCT07180693


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