Figure 9 presents the main finding of IPASS study (Mok et al., 2009): the presence in the tumor of a mutation of the EGFR gene is strongly predictive for better outcome with gefitinib. We therefore expect EGFR mutation status to appear as a strongly predictive biomarker. A detailed description of the trial can be found in Section S8 of the Supplementary Material. This evidence concerns the gene EGFR and neoplasm.