CRKL and gastric cancer: When we compared the level of CRKL expression between non-cancerous gastric foveolar epithelium (n = 41) and gastric cancer (n = 360), the level of CRKL expression in gastric cancer (mean ± standard deviation = 0.42 ± 0.63) was significantly higher than that in non-cancerous tissue (0.20 ± 0.26) (P = 0.032) (Figures 3A, 3E).