Making the first move in EGFR-driven or ALK-driven NSCLC: first-generation or next-generation TKI?

The traditional approach to the treatment of patients with advanced-stage non-small-cell lung carcinoma (NSCLC) harbouring ALK rearrangements or EGFR mutations has been the sequential administration of therapies (sequential treatment approach), in which patients first receive first-generation tyrosine-kinase inhibitors (TKIs), which are eventually replaced by next-generation TKIs and/or chemotherapy upon disease progression, in a decision optionally guided by tumour molecular profiling. In the past few years, this strategy has been challenged by clinical evidence showing improved progression-free survival, improved intracranial disease control and a generally favourable toxicity profile when next-generation EGFR and ALK TKIs are used in the first-line setting. In this Review, we describe the existing preclinical and clinical evidence supporting both treatment strategies — the ‘historical’ sequential treatment strategy and the use of next-generation TKIs — as frontline therapies and discuss the suitability of both strategies for patients with EGFR-driven or ALK-driven NSCLC. The clinical management of patients with non-small-cell lung carcinoma has greatly evolved owing to the development of tyrosine-kinase inhibitors (TKIs) targeted against the driver mutations of this disease. The authors of this Review describe the existing evidence on the sequential administration of TKIs and the use of next-generation TKIs upfront.