For example, low PHD1 staining was found in lung cancers (Andersen et al. 2011) (Giatromanolaki et al. 2008) and high PHD1 staining in pancreatic endocrine tumors (Couvelard et al. 2008) and pancreatic adenocarcinomas (Gossage et al. 2010). Here, EGLN2 is linked to pancreatic neuroendocrine tumor.