RET and thyroid tumor: Herein, we established a 9-gene mutation panel (BRAFV600E, KRAS, NRAS, HRAS, TERT, TP53, PAX8/PPARG, CCDC6/ RET and NCOA4/ RET) to sketch the gene mutation profile of thyroid neoplasms and to explore the diagnostic value of multi-gene testing in Chinese population based on BSRTC.