Continuation of TKI With or Without Chemotherapy Beyond Gradual Progression

There have been reports suggesting that continuous administration of epidermal growth factor receptor-tyrosine kinase inhibitors (EGFR-TKIs) is advantageous for patients in which gradual disease progression was observed after the establishment of clinical benefit from EGFR-TKIs. However, whether EGFR TKI with or without chemotherapy provides more survival benefit has not been formally evaluated.