The multikinase inhibitor regorafenib was recently approved for the treatment of patients with metastatic colorectal cancer (mCRC) who had been previously treated with fluoropyrimidine-, oxaliplatin-, and irinotecan-based chemotherapy, anti-VEGF therapy, and, for patients with wild-type KRAS tumors, anti-EGFR therapy. 1 Regorafenib inhibits numerous membrane-bound and intracellular kinases involved in normal cell function and in oncogenesis, tumor angiogenesis, and maintenance of the tumor microenvironment (including RET, VEGFR1, VEGFR2, VEGFR3, KIT, PDGFR- , PDGFR- , FGFR1, FGFR2, TIE2, DDR2, Trk2A, Eph2A, RAF-1, BRAF, BRAFV600E, SAPK2, PTK5, and Abl kinases). The approval was based on findings in the international, phase 3 CORRECT trial 2…
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