<unk> s are neuroendocrine tumors (NETs), usually located in the duodenum or pancreas, that secrete gastrin and cause a clinical syndrome known as Zollinger-Ellison syndrome (ZES). A large number of<unk> s develop in the pancreas or duodenum, with near-equal frequency, and approximately 10% arise as primary neoplasms in lymph nodes of the pancreaticoduodenal region<unk>  triangle). Most<unk> s are sporadic (75%–80%), whereas approximately 20% to 25% are associated with multiple endocrine neoplasia type 1(MEN-1). Over 50% of<unk> s are malignant and can metastasize to regional lymph nodes and liver. One fourth of<unk> s are related to multiple endocrine neoplasia type 1, Zollinger–Ellison syndrome, peptic ulcer disease.
Gastrinoma
Glomus tumor
Somatostatinoma
VIPoma
Glucagonoma
Ceruminous adenoma
Insulinoma
Nipple adenoma