Factors that were associated with statistically significantly worse OS in this analysis included an age of <50 years (p=0.016), right-sided tumor origin (p<0.001), poor differentiation (p<0.001), KRAS mutations (p<0.001), BRAF mutations (p=0.004), and PIK3CA mutations (p=0.007). This evidence concerns the gene KRAS and neoplasm.