CEACAM5 and carcinoma: As CEACAM7 expression was found to be closely correlated with CEA expression in gastric carcinoma in this study, We checked its correlation with various clinicopathological features, and found that CEACAM7 expression was more frequent in poorly differentiated gastric carcinomas than in well and moderately differentiated carcinomas (P = 0.006), and was also correlated with Lauren's classification (P = 0.023).