New hope for advanced breast cancer: experimental drug combo under study
NCT ID NCT03332797
First seen Nov 17, 2025 · Last updated May 20, 2026 · Updated 22 times
Summary
This study tests an experimental drug called GDC-9545, alone or with other medicines, in people with advanced estrogen receptor-positive breast cancer that has spread. The main goals are to check the drug's safety and find the best dose. About 181 participants will take part in this early-phase trial.
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This is a summary of
the original study
.
Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Contacts and locations
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Locations
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Asan Medical Center
Seoul, 05505, South Korea
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Barts Health NHS Trust
London, E1 2ES, United Kingdom
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Beth Israel Deaconess Medical Center
Boston, Massachusetts, 02215, United States
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Centro Oncologioco MD Anderson Internacional
Madrid, 28033, Spain
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Dana Farber Cancer Institute
Boston, Massachusetts, 02215, United States
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Hospital Clinico Universitario de Valencia
Valencia, 46010, Spain
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Hospital General Universitario Gregorio Maranon
Madrid, 28007, Spain
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Hospital Quiron Barcelona
Barcelona, 08023, Spain
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Hospital Universitari Vall d'Hebron
Barcelona, 08035, Spain
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Hospital Universitario HM Sanchinarro
Madrid, 28050, Spain
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Hospital Universitario Ramón y Cajal
Madrid, 28034, Spain
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ICO L'Hospitalet
L'Hospitalet de Llobregat, Barcelona, 08908, Spain
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Massachusetts General Hospital.
Boston, Massachusetts, 02115, United States
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Memorial Sloan Kettering Cancer Center
New York, New York, 10065, United States
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National Cancer Center
Gyeonggi-do, 410-769, South Korea
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Peter Maccallum Cancer Centre
Melbourne, Victoria, 3000, Australia
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Samsung Medical Center
Seoul, 06351, South Korea
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Seoul National University Hospital
Seoul, 03080, South Korea
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Severance Hospital, Yonsei University Health System
Seoul, 03722, South Korea
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St Vincent's Hospital Sydney
Darlinghurst, New South Wales, 2010, Australia
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The Royal Marsden Hospital
Suttton, SM2 5PT, United Kingdom
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University of Colorado
Aurora, Colorado, 80045, United States
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Vanderbilt University Medical Center
Nashville, Tennessee, 37204, United States
Conditions
Explore the condition pages connected to this study.