New hope for japanese women with Tough-to-Treat breast cancer?
NCT ID NCT04568902
First seen Nov 01, 2025 · Last updated Apr 28, 2026 · Updated 25 times
Summary
This early-stage study tested a new drug called H3B-6545 in 33 Japanese women with a common type of breast cancer (ER-positive, HER2-negative) that had already been treated with hormone therapy. The main goal was to check the drug's safety and find the right dose. The study did not aim to cure the cancer, but to see if the drug could be a safe treatment option.
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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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Eisai Trial Site 1
Kōtoku, Japan
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Eisai Trial Site 2
Chūōku, Japan
Conditions
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