KIT and sarcopenia: The independent risk factors for DFS were identified as sarcopenia (HR=3.067 vs. no sarcopenia, P=0.013), myosteatosis (HR=6.985 vs. no myosteatosis, P=0.024), high-risk classification (HR=9.562 vs. moderate-risk, P=0.003), and C-KIT exon 9 mutation (HR=3.615 vs. C-KIT exon 11 mutation, P=0.013).