Prediction of Treatment Efficacy of the Combination of Palbociclib/(Letrozole or Anastrozole) in First Line Metastatic Women With Luminal, HER2 Negative Advanced Breast Cancer, Using Infrared Laser Spectroscopy Analysis on Liquid Biopsies.
This study is a multicenter, international, open-label phase II study. Based on inclusion/exclusion criteria, eligible pre and postmenopausal patients with newly diagnosed metastatic luminal hormone receptor-positive and HER2 negative breast cancer, will be prospectively treated with a standard combination of hormone therapy (Letrozole or Anastrozole) and Palbociclib. This combination will continue until progression. Treatment response will be evaluated every three months using clinical and radiological assessments (Revised RECIST guidelines).
Patients will undergo serial liquid biopsies (blo