Fulvestrant will be administered by intramuscular injection on day 1, day 15 and day 29 and then every 28 days thereafter.
Participants will have a physical examination and blood work performed on each treatment date. After teh study treatment has been completed, the physical examinations will be done every three months for the first 2 years, every 6 months for years 2-5, and annually after 5 years.
Participants may remain on study treatment until disease progression or until they experience serious side effects.