Fulvestrant and/or Anastrozole in Treating Postmenopausal Patients With Stage II-III Breast Cancer Undergoing Surgery

Summary

The study is being conducted to determine whether neoadjuvant endocrine therapy with fulvestrant or the combination of anastrozole and fulvestrant, is better than anastrozole when given before surgery to shrink the cancer and stop it from growing. Anastrozole inhibits tumor growth by reducing the levels of estrogen and has been approved by the Food and Drug Administration (FDA) of the United States for use after surgery for postmenopausal women with estrogen receptor positive breast cancer. It is also considered a standard of care to give anastrozole for a few months before surgery to shrink the tumor. Fulvestrant inhibits tumor cell growth by reducing the levels of estrogen receptor in the tumor cell. It is not approved by the FDA for use in women with early stage breast cancer before or after surgery, but is approved by the FDA for patients with advanced (Stage 4) estrogen receptor positive breast cancer that has spread to other parts of the body.

Timeline

Start

2014-02-27

Primary completion

2027-04-01

Completion

2027-04-01

Publications

• Ma CX, Suman VJ, Sanati S, Vij K, Anurag M, Leitch AM, Unzeitig GW, Hoog J, Fernandez-Martinez A, Fan C, Gibbs RA, Watson MA, Dockter TJ, Hahn O, Guenther JM, Caudle A, Crouch E, Tiersten A, Mita M, Razaq W, Hieken TJ, Wang Y, Rimawi MF, Weiss A, Winer EP, Hunt KK, Perou CM, Ellis MJ, Partridge AH, Carey LA. Endocrine-Sensitive Disease Rate in Postmenopausal Patients With Estrogen Receptor-Rich/ERBB2-Negative Breast Cancer Receiving Neoadjuvant Anastrozole, Fulvestrant, or Their Combination: A Phase 3 Randomized Clinical Trial. JAMA Oncol. 2024 Mar 1;10(3):362-371. doi: 10.1001/jamaoncol.2023.6038.
• Ellis MJ, Suman VJ, Hoog J, Goncalves R, Sanati S, Creighton CJ, DeSchryver K, Crouch E, Brink A, Watson M, Luo J, Tao Y, Barnes M, Dowsett M, Budd GT, Winer E, Silverman P, Esserman L, Carey L, Ma CX, Unzeitig G, Pluard T, Whitworth P, Babiera G, Guenther JM, Dayao Z, Ota D, Leitch M, Olson JA Jr, Allred DC, Hunt K. Ki67 Proliferation Index as a Tool for Chemotherapy Decisions During and After Neoadjuvant Aromatase Inhibitor Treatment of Breast Cancer: Results From the American College of Surgeons Oncology Group Z1031 Trial (Alliance). J Clin Oncol. 2017 Apr 1;35(10):1061-1069. doi: 10.1200/JCO.2016.69.4406. Epub 2017 Jan 3.

Drugs

Indications