ALK and non-small cell lung carcinoma: Among the driver oncogenes, chromosomal rearrangements of anaplastic lymphoma kinase (ALK), ROS proto-oncogene 1 (ROS1), rearranged during transfection (RET), and neurotrophic receptor tyrosine kinases (NTRKs) are each observed in 0.1–5% of NSCLC patients1,2,5,6.