KRAS and neoplasm: No significant correlation was observed between the clinical and pathological features of the patients and KRAS mutation status (G/T and G/A) (gender, P = 0.447; age above 65 years old, P = 0.134; ECOG, P = 0.337; histological type, P = 0.606; degree of cell differentiation, P = 0.409; lymph node affection, P = 0.979; lung metastasis, P = 0.364, liver metastasis, P = 0.510; synchronous metastasis, P = 0.619; obstructive/perforated acute abdomen, P = 0.447; tumor size, P = 0.447; and relapse of disease, P = 0.646).