SFRP4 and diffuse gastric adenocarcinoma: In the Forster Gastric dataset, SFRP4 over-expression was 8.758-fold higher (p = 4.90 × 10−5) in diffuse gastric adenocarcinoma tissues than in normal tissues, whereas Cho found a 3.437-fold increase (p = 7.77 × 10−6) and Chen found a 3.559-fold increase in SFRP4 mRNA expression (p = 1.93 × 10−18) in gastric intestinal-type adenocarcinoma tissues (Table 1).