OS was also prolonged in CCDC6-RET fusion versus KIF5B-RET fusion positive patients (median 113.5 vs 37.7 months; HR 0.12, 95%CI 0.04-0.38, p=0.009)….In RET rearranged NSCLC, selective RET TKI therapy is associated with improved survival outcomes, especially in CCDC6-RET positive patients.