ALK and non-small cell lung carcinoma: 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.