The discovery of RET fusion as an oncogenic driver in about 2% of NSCLC led to in vitro work demonstrating sensitivity to a variety of inhibitors of RET, including a number of TKIs. These findings have now spawned the launch of several trials targeting this genetic abnormality, including Phase II studies at Memorial Sloan-Kettering evaluating cabozantinib and a Dana-Farber trial evaluating sunitinib in addition to a soon-to-be-launched effort at Massachusetts General Hospital assessing the newly approved CML drug ponatinib in this patient subset.