The Cho Gastric dataset indicated that expression of RECQL5 was downregulated in diffuse gastric adenocarcinoma (n=31; P=0.020), gastric adenocarcinoma (n=4; P=6.82×10−4), and gastric mixed adenocarcinoma (n=10; P=0.007) compared with that in normal gastric tissues (n=19; Fig. 1A-C). This evidence concerns the gene RECQL5 and gastric adenocarcinoma.