Detection of Echinoderm microtubule-associated protein-like 4-anaplastic lymphoma kinase (EMLK4-ALK) and ROS Proto-Oncogene 1, Receptor Tyrosine Kinase (ROS1) gene rearrangements in NSCLC is required for directing patient care. This evidence concerns the gene NTRK1 and non-small cell lung carcinoma.