open to eligible people ages 18 years and up
Approximately 70 patients with HR+ advanced breast cancer will be enrolled. All patients will receive either fulvestrant (500 mg IM every 2 weeks x 3 then every four weeks) or tamoxifen (20 mg PO daily by physician choice). Pre-menopausal women must be in chemical menopause. Arm 1 will receive palbociclib 100 mg qd, days 1-21 every 28 days. Arm 2 will receive palbociclib 125 mg qd, days 1-21 every 28 days. Restaging will be performed every 8 weeks. Therapy will be continued until PD or unacceptable toxicity. Patients will be randomly allocated in a 1:1 ratio to take either 100 mg or 125 mg of palbociclib. Randomized treatment assignments will be made by permuted blocks, generated by our collaborating statistician at Dana-Farber Cancer Institute.
San Francisco, California and other locations