Su et al. detected T790M in 2.8% of Chinese patients with TKI-naïve NSCLCs [20], while Rosell et al., using a Taqman assay, reported that 35% of EGFR M+ (L858R or 19 del) NSCLC had concomitant T790M mutation in Caucasians [21]. The gene discussed is EGFR; the disease is non-small cell lung carcinoma.