nan
Predictive, Diagnostic evidence:
Predictive: The study indicates that patients with EGFR mutations, including the L858R variant, had a significantly better response rate (82%) and longer time to progression (median, 12.6 months) when treated with gefitinib compared to those with wild-type EGFR, demonstrating the predictive value of this variant for treatment outcomes.
Diagnostic: The presence of the L858R mutation is mentioned as part of the broader category of EGFR mutations in patients with non-small-cell lung cancer (NSCLC), which helps classify these patients as having a specific subtype of the disease that is associated with better clinical outcomes when treated with gefitinib.