FABP2 and ampulla of vater adenocarcinoma: Increased expressions of ACAA1 (acetyl-CoA acyltransferase 1, Figure 7A), FABP1 (fatty acid-binding protein 1, Figure 7D), PPARA (Figure 7F), and FABP2 (Figure 7G) genes were seen in ampullary adenocarcinomas compared to pancreatic adenocarcinomas.