PGC and cholangiocarcinoma: PGC expression was higher in cholangiocarcinoma, colon adenocarcinoma, rectum adenocarcinoma, bladder urothelial carcinoma, uterine corpus endometrial carcinoma, and breast cancer but lower in kidney renal clear cell carcinoma, prostate adenocarcinoma, lung squamous cell carcinoma, stomach adenocarcinoma, and esophageal carcinoma.