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FDA approves 1st-of-its-kind breast cancer treatment
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Fusion42 · 8 September 2026 · Fusion42 review
The FDA has granted accelerated approval to Etcamah (camizestrant), the first cancer therapy approved based on detection of a resistance mutation in circulating tumor DNA prior to visible disease progression. The treatment targets HR-positive, HER2-negative breast cancer patients with an ESR1 mutation detected during aromatase inhibitor and CDK4/6 inhibitor therapy, improving progression-free survival compared to standard care.
This Wire brief sits within Fusion42's coverage of Biotech, and 14 sources have reported it between 4 Sep 2026 and 9 Sep 2026.
◆ ◆ The Wire takeaway
You must adapt your breast cancer drug development to target early resistance mutations detected in blood tests, as FDA approval now rewards this precise approach before imaging. Companion diagnostics like Guardant360 CDx will become vital tools to gain regulatory and market access.
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14 sources · first reported 4 Sep 2026 · latest 9 Sep 2026
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