To date, more than 17 fusion subtypes with fusion breakpoints in EML4 exons 2, 3, 6, 7, 8, 10, 13, 14, 15, 16, 17, 18, 19, 20, 21 and 23 have been identified in EML4-ALK-positive NSCLC. The gene discussed is EML4; the disease is non-small cell lung carcinoma.