Previously, we screened for ALK, ROS1, and RET fusion genes in 795 lung adenocarcinoma specimens and identified the novel KIAA1217-RET fusion gene containing KIAA1217 exon 11 and RET exon 11 [7, 25] from a patient with a 4-cm tumor mass (Figure 1A, red arrow). The gene discussed is ROS1; the disease is neoplasm.