Peer-Reviewed Publication
J Manag Care Spec Pharm2026;32(10-b Suppl):S1-S12.October 1, 2026Journal Article

AMCP Market Insights: Managed care approaches to ESR1-mutated advanced breast cancer.

Bridget Flavin1, Carol Tweed2, Janna Evans3, Sara L Fleszar4, Gaurang Gandhi5, Kirollos S Hanna6, Ryan Haumschild7, Timothy O'Shea8, Terry Richardson9, Tina Valbh10, Denise Wolff11
1Connected Content, Ltd., Boulder, CO.
2Maryland Oncology Hematology, Annapolis.
3Blue Cross Blue Shield Texas, Houston.
4Optum Whole Health Solutions, Denver, CO.
5Prime Therapeutics/MagellanRx, Eagan, MN.
6Minnesota Oncology, Mayo Clinic School of Medicine, Minneapolis-St. Paul.
7Emory Healthcare and Winship Cancer Institute, Atlanta, GA.
8Horizon Blue Cross Blue Shield of New Jersey, Newark.
9Impact Education, LLC, Blue Bell, PA.
10PharmaKonnect, Tina's Warriors, Mount Dora, FL.
11Denise & Co., LLC, Duluth, Minnesota.

Abstract

A mutation in the estrogen receptor alpha gene (ESR1m) following first-line treatment with endocrine therapy in hormone receptor-positive metastatic breast cancer occurs in nearly half of patients. Detection of this mutation prior to radiologic progression using circulating tumor DNA (ctDNA)-based monitoring is an emerging practice that may allow an early switch to a more effective therapy. To dis…

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