Pancreatic Neuroendocrine Tumor

A well-differentiated, low-, intermediate-, or high-grade neoplasm with neuroendocrine differentiation that arises from the pancreatic islets (islets of Langerhans). According to the presence or absence of clinical syndromes that result from hormone hypersecretion, pancreatic neuroendocrine tumors are classified either as functional or nonfunctional.

Source: NCI Thesaurus (C27720).