Personalized Genomic Test-Guided Treatment for Early Hormone-Positive Breast Cancer in Premenopausal Women to Optimize Chemotherapy Use

What this Trial Is About

Researchers are investigating whether using a genetic test called Prosigna4 can help decide if chemotherapy is necessary for premenopausal women with hormone receptor-positive HR and HER2-negative breast cancer. This study aims to determine if treatment guided by this test produces similar outcomes to the standard approach of systematic chemotherapy. The trial focuses on younger women who often experience more side effects from chemotherapy, affecting their quality of life and work capacity. Participants will be randomly assigned to one of two groups. In the experimental group, treatment depends on the Prosigna4 score women with a high score above 60 will receive chemotherapy plus hormone therapy, while those with a lower score will receive only hormone therapy with ovarian suppression. The control group will receive the standard treatment of chemotherapy followed by hormone therapy. The study includes a pre-inclusion period for eligibility testing and randomization. Throughout the study, participants will complete questionnaires about quality of life, treatment side effects, emotional well-being, and other health measures for up to five years after randomization. Researchers will monitor cancer recurrence, survival, fertility, osteoporosis, cardiovascular disease, and other outcomes. Regular assessments include physical activity levels, adherence to therapy, and patient perceptions of treatment and participation, aiming to evaluate the safety and impact of treatment guided by the genetic test.

Optimising Adjuvant Chemotherapy Prescription in Young Patients With Hormone-dependent Breast Cancer Using Genomic Tests