We retrospectively analyzed NGS (including tissue, blood, or other body fluid samples) in 61 patients with ALK[+] lung cancer....Compared with EML4-ALK fusion, mPFS treated with crizotinib in non EML4-ALK fusion were significantly shorter (18.2 vs. 8.5 months, P = 0.035). In the context of crizotinib treatment, multiple fusions were associated with worse mPFS compared with single fusions (13.8 vs. 8.4 months, P = 0.008)....Due to the heterogeneity of tumor development resulting in the diversity of ALK fusions, non EML4-ALK fusions and multiple fusions imply a poorer response to crizotinib.