Predictive Impact of Peripheral Blood Lymphocytes on clinicAL outcoMes During First-line CDK4/6 Inhibitors Plus Endocrine Therapy in Patients With Advanced Hormone REceptor-poSitive HER2-negative Breast Cancer: the Retrospective-prospective Multicenter Italian PALMARES-2 Study
PALMARES-2 is a retrospective/prospective, observational, multicenter, population-based study, aiming at providing real-world evidences on HR+/HER2- aBC patients treated with first-line CDK4/6i plus ET. The present study has the objective to collect data coming from different sources, i.e. RWD, medical images and biological samples, from patients treated with CDK4/6i as first-line of therapy for HR+/HER2- aBC. In consideration of the complexity of data collected and different objectives of the study, this master protocol foresees different sub-studies, which encompasses different methodologies for data collection, data extraction and analyses.
• Diagnosis of HR+/HER2- advanced Breast Cancer (aBC), as defined as at least 1% estrogen receptor (ER) and/or progesterone receptor (PgR) positivity at IHC. HER2 negativity is defined on the basis of an IHC score of 0, 1+, or 2+ with absence of gene amplification at in situ hybridization (ISH) analyses.
• Have received or are candidate to receive treatment with palbociclib, ribociclib or abemaciclib in combination with endocrine therapy as first-line treatment for HR+/HER2- aBC.