In this study, we selected the East-Asian homogeneous cases of resected stage IIIA-N2 NSCLC, and we measured ROS1 and KIF5B-RET rearrangements by fluorescent in situ hybridization (FISH), and confirmed the result via direct sequencing and immunohistochemistry (IHC). The gene discussed is RET; the disease is non-small cell lung carcinoma.