SLC2A1 and pancreatic intraductal papillary-mucinous neoplasm: Oda et al. reported that HGD and INV showed higher expression of GLUT-1 than LGD [38]; their studies also found that there are tissue subtypes of IPMN, including many oncocytic types (n = 7) and the pancreatobiliary type (n = 21), which have higher expression of GLUT-1 than those seen in the gastric type (n = 30) and intensive type (n = 22).