In vivo antitumor efficacy of SCH772984 was evaluated in BRAF- or KRAS-mutant xenograft models established from human melanoma or pancreatic carcinoma cell lines.In vivo antitumor efficacy of SCH772984 was evaluated in BRAF- or KRAS-mutant xenograft models established from human melanoma or pancreatic carcinoma cell lines. Treatment of BRAF-mutant LOX melanoma xenografts with SCH772984 (50 mg/kg twice daily) led to 98% tumor regression,