Lung adenocarcinoma with EGFR L858R-K860I and L858R-L861F doublet mutations from which the L858R mutation is undetectable through the cobas EGFR mutation test v2.

Abstract excerpt

In East Asia, epidermal growth receptor factor (EGFR) mutations are the most prevalent and important biomarkers for treating patients with advanced lung cancer. However, as L858R doublet mutations are rare, commercially available EGFR tests may yield false-negative results. To determine whether the L858R mutation of the L858R-K860I and L858R-L861F doublet mutations could be identified using different types of...

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