Real-world Clinical Outcome and Toxicity Data in Patients With Breast Cancer Treated With Abemaciclib Combined With Endocrine Therapy: the Experience of the Hellenic Cooperative Oncology Group

Protocol was amended in November 2021, after the recent FDA approval of abemaciclib in the adjuvant setting. On October 12, 2021, FDA approved abemaciclib with endocrine therapy for the adjuvant treatment of adult patients with hormone receptor -positive, HER2-negative, node-positive, early breast cancer at high risk of recurrence and a Ki-67 score ≥20%. Our study will now include real-world data on efficacy and toxicity of abemaciclib in the adjuvant setting as well. 2-negative advanced breast cancer. Patients who are enrolled and the patients to be enrolled will refer to a dedicated online platform (CARE ACROSS platform) where they can register their side-effects of cancer and the treatment received at frequent intervals. Patients will be randomized in the platform in two arms with an allocation 1:1(automatically by the platform). After every report of their side-effects, patients in Arm A will receive an acknowledgement and suggestion to stay in contact with their clinician. After every report of their side- effects, patients in Arm B will receive an acknowledgment and suggestion to stay in contact with their clinician; additionally they will receive personalised support (as a few word text) for each side-effect reported. Clinicians involved in the trial will refer patients (upon enrollment or to those already enrolled) to a dedicated online platform. Patients will sign up by entering their patient ID and their email address (and picking their password for security).