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Crit Rev Oncol Hematol. 2017 Sep;117:38-47. doi: 10.1016/j.critrevonc.2017.07.003. Epub 2017 Jul 5.

Third generation EGFR TKIs in EGFR-mutated NSCLC: Where are we now and where are we going.

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Medical Oncology Unit A.O. Papardo & Department of Human Pathology University of Messina, Italy.
Phase I - Early Clinical Trials Unit, Oncology Department, Antwerp University Hospital and Center for Oncological Research (CORE), Antwerp University, Edegem, Belgium.
Medical Oncology Unit A.O. Papardo & Department of Human Pathology University of Messina, Italy. Electronic address:


The therapeutic landscape of Non Small Lung Cancer (NSCLC) has been profoundly changed over the last decade with the clinical introduction of Epidermal Growth Factor Receptor (EGFR) tyrosine kinase inhibitors (TKIs) and the discovery of EGFR activating mutations as the major predictive factor to these agents. Despite impressive clinical activity against EGFR-mutated NSCLCs, the benefit seen with 1st and 2nd generation EGFR TKIs is usually transient and virtually all patients become resistant. Several different mechanisms of acquired resistance have been reported to date, but the vast majority of patients develop a secondary exon 20 mutation in the ATP-binding site of EGFR, namely T790M. The discovery of mutant-selective EGFR TKIs that selectively inhibit EGFR-mutants, including T790M-harboring NSCLCs, while sparing EGFR wild type, provide the opportunity for overcoming the major mechanism of acquired resistance to 1st and 2nd generation EGFR TKIs, with a relatively favorable toxicity profile. The development of this novel class of EGFR inhibitors poses novel challenges in the rapidly evolving therapeutic paradigm of EGFR-mutated NSCLCs and the next few years will witness the beginning of a new era for EGFR inhibition in lung cancer. The aim of this paper is to provide a comprehensive overview of the increasing body of data emerging from the ongoing clinical trials with this promising novel therapeutic class of EGFR inhibitors.


Afatinib; EGFR TKI; EGFR mutations; NSCLC; Olmutinib; Osimertinib; Resistance; Rociletinib

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