CDH6 and gastric cancer: By analyzing the relationship between the prognostic CDH genes and the abundance of tumor immune infiltration (Fig. 19A–D), we found that expression level of CDH6 (r = 0.138, P = 7.82 × 10−3) and CDH7 (r = 0.104, P = 4.57 × 10−2) were significantly related to B cell infiltration in GC tumor tissues.