69 pts treated at the 40-120mg dose levels (57 NSCLC, 10 MTC, 1 pancreatic cancer, 1 ovarian cancer) were evaluable for efficacy analysis, ORR was 64% (NSCLC, MTC and pancreatic cancer)….KL590586 was well-tolerated, and associated with robust clinical activity in RET-altered tumors regardless of tumor type, including NSCLC pts with resistance to1st gen SRIs and with CNS mets.