Also, genomic analysis after treatment progression can be very productive as demonstrated with studies of imatinib-resistant CML harboring the difficult-to-treat T315 resistance-associated mutation in BCR-ABL and resistance-associated mutations in EGFR, such as T790M in lung cancer, where this knowledge has led to the development of new therapeutics (ponatinib approved for CML and several drugs in testing for EGFR-kinase inhibitor-refractory lung cancer) [11,12]. The gene discussed is EGFR; the disease is lung carcinoma.