Could estrogen fight breast cancer? new study targets resistant tumors

NCT ID NCT05716516

First seen Jan 17, 2026 · Last updated May 13, 2026 · Updated 20 times

Summary

This study tests if a form of estrogen (estradiol) can help control advanced breast cancer that is hormone-receptor-positive (ER+). It includes 36 post-menopausal women whose cancer has spread or returned and who have already tried other hormone therapies. The goal is to see if women with a specific gene change (ESR1 mutation) respond better than those without it.

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Contacts and locations

Study contacts

  • Contact

    Phone: •••-•••-•••• Email: •••••@•••••

Locations

  • Dartmouth-Hitchcock Medical Center

    RECRUITING

    Lebanon, New Hampshire, 03756, United States

Conditions

Explore the condition pages connected to this study.