CEACAM5 and gastric cancer: By contrast, no any associations between ALP, LDH, CEA, AFP, and peripheral lymphocytes were observed among those 48 non-AFP-GC patients (ALP and LDH, R2 = 0.021; CEA and ALP, R2 = 0.0141; CEA and LDH, R2 = 0.013; AFP and peripheral lymphocytes, R2 = 0.0152) (Figure 2).