Two pts with BRAF mutated ATC received treatment with dabrafenib + trametinib, reaching an ORR of 100% and median PFS of 10 months. Five pts with RET mutated medullary thyroid cancer were treated with a selective RET inhibitor, achieving an ORR of 80%....Targeted therapy resulted in outstanding response rates and may have a significant survival benefit in aggressive tumors, such as ATC.