KRAS and gastric adenocarcinoma: The analysis of KRAS amplification in relation to the molecular classification of gastric adenocarcinoma (according to TCGA) revealed that 24 (88.8%) were related to tumors with chromosomal instability (CIN) and 3 (11.1%) were related to genomically stable (GS) tumors (p = 0.282) (Table 2).