Chemotherapy and Osimertinib Combination Should Not Be the First-Line Treatment for All Advanced EGFR+ NSCLC
EGFR accounts for 15% to 50% of nonsquamous, advanced NSCLC. Among various EGFR tyrosine kinase inhibitors (TKIs) designed to target sensitizing mutations (exon 19 deletion, exon 21 L858R), osimertinib remains the standard of care approved by the U.S. Food and Drug Administration in the first-line treatment of EGFR-mutated, advanced NSCLC. Despite continued efforts, disease progression remains inevitable with a high incidence of brain metastasis and poor prognosis for the patients harboring L858R.