Fig. 3

Second-generation ALK-TKI primary resistance models and therapeutic strategies after crizotinib resistance. (A) Second-generation ALK-TKI resistance model induced by SCC transformation. (B) Second-generation ALK-TKI resistance model induced by ALK compound mutation. (C) Prediction to the efficacy of sequential treatment of second-generation ALK-TKI. BBB, blood-brain barrier