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ion of RASSF1A were 17.20 and 42.13 months for patients without promoter region hypermethylation of RASSF1A and the patients with KRAS mutation with or without hypermethylation of the promoter region of RASSF1A a tumor suppressor gene had poorer survival compared with those patients with wild type KRAS gene, with or without hypermethylation of RASSF1A promoter region. These differences were statistically significant based on Log-rank (Mantel-cox) test (P = 0.0001). The median survivals among patients with mutation in KRAS protooncogene were 16 months and 42