“…Sensitivity to ALK inhibitors remains unclear in these cases. Mechanisms of acquired resistance to ALK inhibitors have been identified, such as ALK mutations (L1196M, I1171T, D1203N, G1269A/F1174L, G1202R, W1295C, G1202R/L1196M, G1202R/G1269A) and bypass mutations in other genes, such as NRAS G12V, EGFR R108K, PIK3CA E545K, EGFR P753S, BRAF V600E, and MET D1246N ( 7 - 9 ).…”