This study is designed to investigate and characterize the safety, tolerability and PK of AZD9833 monotherapy (Part A, Part B-cohort 1) or in combination with palbociclib (optional Part B cohort 2) or everolimus (optional Part B cohort 3) and to explore the preliminary anti-tumour activity in Chinese patients
A Phase 1 Dose Escalation and Expansion Study of AZD9833 Alone or in Combination in Chinese patients with ER Positive, HER2 Negative, Metastatic Breast Cancer