VTCN1 and gastric cancer: Arigami et al. reported that B7-H4 expression in blood of GC patients significantly correlated with depth of infiltration (p = 0.006), lymph node metastasis (p = 0.001), TNM stage (p < 0.001), lymphatic invasion (p < 0.001), venous invasion (p = 0.010) [66].