Although the major known fusion partner for ALK in NSCLC is the echinoderm microtubule-associated protein-like 4 (EML4), of which 15 variants have been described, an additional number of 20 further ALK fusions with other genes are known, of which three have already been found in NSCLC [58,59,60]. This evidence concerns the gene ALK and non-small cell lung carcinoma.