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Ifinatamab Deruxtecan Biologics License Application for Certain Patients with Previously ...
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Fusion42 · 28 September 2026 · Fusion42 review
Daiichi Sankyo and Merck have voluntarily withdrawn the U.S. Biologics License Application for accelerated approval of ifinatamab deruxtecan in extensive-stage small cell lung cancer patients, citing insufficient data to meet FDA requirements from the phase 2 IDeate-Lung01 trial. Enrollment continues in a phase 3 trial (IDeate-Lung02), with further phase 3 studies underway for other cancer types.
This Wire brief sits within Fusion42's coverage of Biotech.
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You face a tougher FDA bar on accelerated cancer drug approvals with ifinatamab deruxtecan’s withdrawal. Clinical-stage founders in oncology must now lean heavily on late-stage trial results to secure US market entry.
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1 source · 28 Sep 2026
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