VTCN1 and cancer: The expression of B7-H4 in gastric (169, 170), breast (171, 172), lung (145), prostate (173), pancreatic (174), bladder (175), colorectal (176), ovarian (177), renal (178), urothelial (179), esophageal (180), and gallbladder (181) cancers is associated with tumor size, primary tumor grade, TNM stage, low survival rate, drug resistance and a decreased number of tumor-infiltrating T cells.