pancreatic neuroendocrine tumor (MONDO_0019954) is pancreatic endocrine tumor, also known as pancreatic neuroendocrine tumor (PNET), describes a group of endocrine tumors originating in the pancreas that are usually indolent and benign, but may have the potential to be malignant. They can be functional, exhibiting a hormonal hypersecretion syndrome, but can be non-functional presenting with non-specific symptoms and include insulinoma, glucagonoma, VIPoma, somatostatinoma (SSoma), PPoma and Zollinger-Ellison syndrome (ZES, or gastrinoma) and other ectopic hormone producing tumors (such as GRFoma). Also known as: islet cell tumor, islet cell tumors - pancreas, islet cell tumors of the pancreas, islet cell tumour, islet cell tumours - pancreas, islet cell tumours of the pancreas, pancreatic NET, well differentiated pancreatic endocrine neoplasm.