Numerous studies have reported that quercetin induces apoptosis and inhibits the proliferation, migration, and invasion of NSCLC cells harboring wild-type EGFR [9,10,11,12,13,14,15], although it is not known whether TKI-resistant NSCLC cells are sensitive to quercetin. The gene discussed is EGFR; the disease is non-small cell lung carcinoma.