Source:http://linkedlifedata.com/resource/umls/id/C1337011
NCI: A low or intermediate grade well differentiated tumor with neuroendocrine differentiation that arises from the pancreas. According to the presence or absence of clinical syndromes that result from hormone hypersecretion, pancreatic neuroendocrine tumors are classified either as functional or nonfunctional.,NCI: A mass of abnormal cells that forms in the endocrine (hormone-producing) tissues of the pancreas. Islet cell tumors may be benign (not cancer) or malignant (cancer).