A NIS of Alpelisib in Combination With Fulvestrant in Postmenopausal Women, and Men, With HR+,HER2- , Locally Advanced or Metastatic Breast Cancer With a PIK3CA Mutation, After Disease Progression Following Endocrine Therapy as Monotherapy, in the Real-world Setting

This was a prospective, multi-national, non-interventional study (NIS) collecting data from postmenopausal women, and adult men, with HR+, HER2- locally advanced or metastatic breast cancer whose tumor harbors a PIK3CA mutation, and who were to be treated with alpelisib in combination with fulvestrant after disease progression following endocrine therapy as monotherapy, in the real-world setting.