Fig. 2

Potential mechanism of second-generation ALK-TKI resistance. The NGS results following second-generation ALK-TKI resistance in 44 patients were subjected to statistical analysis, revealing that secondary mutations in ALK kinase domains (25/44, 56.8%) represent the primary mechanism of resistance. And G1202R mutation was the most common mutation site (12/25, 48.0%) in ALK kinase domains