FAP and hepatocellular carcinoma: ,2 FAP is expressed in most solid cancers, including distal cholangiocarcinoma,3 hepatocellular carcinomas,4 esophageal squamous cell carcinoma,5 pancreatic adenocarcinomas,6 osteosarcomas,7 esophageal adenocarcinomas,8 hepatocellular carcinomas,9 urothelial carcinomas,10 and epithelial ovarian carcinoma,11 as well as other diseases.12