Emergence of EGFR G724S after progression on osimertinib responded to afatinib monotherapy

W Fang, Y Huang, J Gan, Q Zheng, L Zhang - Journal of Thoracic Oncology, 2020 - jto.org
To the Editor: EGFR G724S/19del has been reported to induce resistance to osimertinib and
retain sensitivity to afatinib in vitro studies. 1, 2 Afatinib activity in EGFR G724S/19del mutant
patients hasn't been reported yet. Herein, we report that emergence of EGFR G724S after
progression on osimertinib responded to afatinib monotherapy. A 55-year-old Chinese
female never-smoker referred to a local hospital for repetitive cough in February 2017.
Computed tomography (CT) scan of the chest revealed a pulmonary mass in the left lobe …
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