ALK and squamous cell lung carcinoma: So far, about 60% of lung adenocarcinoma has been found harbouring driver oncogenes, the rate of lung squamous cell carcinoma driven genes detection has gradually improved, in which epidermal growth factor receptor (EGFR), anaplastic lymphoma kinase (ALK), fibroblast growth factor receptor 1 (FGFR1), phosphatidylinositol 3-kinase catalytic subunit alpha (PIK3CA) and so on plays important roles.