First-line Treatment Options |
All patients with a sensitising EGFR mutation, irrespective of clinical parameters including gender, tobacco exposure, histology, and PS | - Offer first-line treatment with EGFR TKIs
- Single-agent EGFR TKIs can be used as standard due to potential increase in toxicity, costs, and patient inconvenience as each additional treatment is added
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Patients with activating EGFR mutation (exon 19 deletion or exon 21 L858R), particularly those who have CNS metastases | - Osimertinib is preferable
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Patients with a major uncommon, non-exon 20 insertion, sensitising EGFR mutation | - Afatinib or osimertinib are options
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Other first-line treatment options | - Single agents: erlotinib, gefitinib, afatinib, and dacomitinib
- Gefitinib combined with carboplatin–pemetrexed
- EGFR TKIs combined with anti-angiogenic therapy, e.g. erlotinib–bevacizumab or erlotinib–ramucirumab
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Continue with EGFR TKIs in patients with moderate radiological progression and ongoing clinical benefit |
Progression and Treatment Resistance Options |
Resistance to first-line first- or second-generation EGFR TKIs | - Test for EGFR exon 20 T790M mutation from plasma cfDNA and/or tumour re-biopsy
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T790M-positive resistance | - Osimertinib as second line
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T790M-negative resistance | |
Develops resistance to osimertinib | - Genomic analysis by NGS (either tissue or cfDNA followed by tissue if no target found with cfDNA)
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Progression on osimertinib | - Platinum-doublet ChT; encourage clinical trial enrolment, particularly if a targetable resistance mechanism is identified
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EGFR TKI failure, PS 0–1, and no contraindications for ICIs | - Consider the combination of atezolizumab–bevacizumab–paclitaxel–carboplatin
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Progression on EGFR TKIs and ChT | - Consider single-agent ICIs only in these circumstances
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NSCLC=non-small cell lung cancer; EGFR=epidermal growth factor receptor; PS=performance status; TKIs=tyrosine kinase inhibitors; CNS=central nervous system; cfDNA=cell-free DNA; ChT=chemotherapy; NGS=next generation sequencing; ICI=immune checkpoint inhibitor |