Opdivo's Failure In First-Line Lung Cancer Prompts Rethink On Trial Endpoints

Merck's Keytruda gains huge advantage in first-line lung cancer as Bristol's stumble in patients with lower expression of PD-L-1 biomarker raises questions about cut-off levels in trials.

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The spectacular failureofBristol-Myers Squibb Co.'s PD-1 inhibitor Opdivo in the CheckMate 026 first-line lung cancer study raises questions about whether the right cut-off levels for the PD-L1 expression biomarker were used.

Bristol reported that the drug missed the primary progression-free-survival endpoint in the first-line CheckMate 026 study on Aug. 5, prompting a dive that had the company closing down 15.99% and competitors up

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