Spanish Breast Cancer Research Group

This phase 3 trial tests whether a combination of alpelisib (a targeted pill) and trastuzumab (Herceptin), with or without fulvestrant, works better than standard chemotherapy plus trastuzumab for people with advanced HER2+ breast cancer that has a PIK3CA mutation. The study enro…

This study tests whether a combination of two pills (letrozole and abemaciclib) works as well as standard chemotherapy before surgery in women with a common type of early breast cancer (HR-positive, HER2-negative) that is at high or intermediate risk of coming back. About 200 wom…

This study collects information from about 866 women to better understand breast cancer that occurs during pregnancy, breastfeeding, or within a year after giving birth, as well as in women who become pregnant after breast cancer treatment. Researchers will track details like tum…