KDR and neoplasm: Cabozantinib (XL-184, Exelixis, South San Francisco, CA) is a small compound tyrosine kinase inhibitor of VEGFR2, c-MET and RET and has been shown to block tumor development in the RipTAG2 mouse model of pancreatic carcinogenesis more effectively than blockade of c-MET or VEGFR2 alone [19], [28], [29].