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Sponsor: Pfizer
Conditions: Metastatic Breast Cancer
Interventions: Palbociclib, Fulvestrant, Placebo, Fulvestrant
Countries: United States, Australia, Belgium, Canada, Germany, Ireland, Italy, Japan
The study is a randomized, double blind, placebo controlled, Phase 3 clinical trial with the primary objective of demonstrating the superiority of palbociclib in combination with fulvestrant (Faslodex®) over fulvestrant alone in prolonging PFS in women with HR+, HER2 negative metastatic breast cancer whose disease has progressed after prior endocrine therapy. The safety between the two treatment arms will also be compared. During study treatment, pre- and perimenopausal women must be receiving therapy with the LHRH agonist goserelin (Zoladex® or generic).
Sex: FEMALE
Age: 18 Years to —
Healthy volunteers: No
Study type: INTERVENTIONAL
Inclusion Criteria: * Women 18 years or older with metastatic or locally advanced disease, not amenable to curative therapy * Confirmed diagnosis of HR+/HER2- breast cancer * Any menopausal status * Progressed within 12 months from prior adjuvant or progressed within 1 month from prior advanced/metastatic endocrine breast cancer therapy * On an LHRH agonist for at least 28 days, if pre-/peri-menopausal, and willing to switch to goserelin (Zoladex ®) at time of randomization. * Measurable disease defined by RECIST version 1.1, or bone-only disease * Eastern Cooperative Oncology Group (ECOG) PS 0-1 * Adequate organ and marrow function, resolution of all toxic effects of prior therapy or surgical procedures * Patient must agree to provide tumor tissue from metastatic tissue at baseline Exclusion Criteria: * Prior treatment with any CDK inhibitor, fulvestrant, everolimus, or agent that inhibits the PI3K-mTOR pathway * Patients with extensive advanced/metastatic, symptomatic visceral disease, or known uncontrolled or symptomatic CNS metastases * Major surgery or any anti-cancer therapy within 2 weeks of randomization * Prior stem cell or bone marrow transplantation * Use of potent CYP3A4 inhibitors or inducers
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