<unk> rs<unk> s, PETs, or<unk> s), often referred to as "islet cell<unk> rs", or<unk>  endocrine<unk> rs" are<unk>  neoplasms that arise from cells of the endocrine (hormonal) and nervous system within the pancreas.<unk> s are a type of<unk><unk> , representing about one-third of gastroenteropancreatic<unk><unk> s (GEP-NETs). Many<unk> s are benign, while some are malignant. Aggressive<unk><unk> s have traditionally been termed "islet cell carcinoma".<unk> s are quite distinct from the usual form of<unk>  cancer, the majority of which are adenocarcinomas, which arises in the exocrine pancreas. Only 1 or 2% of clinically significant pancreas neoplasms are<unk> s.
Pancreatic neuroendocrine tumor
Small intestine neuroendocrine tumor
Metastatic insulinoma
Acinar cell carcinoma of the pancreas
Glucagonoma
Pancreatic mucinous cystic neoplasm
Insulinoma
Goblet cell carcinoid