NCIt definition : An insulin-producing neuroendocrine tumor arising from the beta cells of the pancreas.
Patients exhibit symptoms related to hypoglycemia due to inappropriate secretion of
insulin.;
Alternative definition : NICHD: A usually benign tumor of insulin secreting pancreatic beta cells, associated
with hypoglycemia.; NCI-GLOSS: An abnormal mass that grows in the beta cells of the pancreas that make
insulin. Beta cell neoplasms are usually benign (not cancer). They secrete insulin
and are the most common cause of low blood sugar caused by having too much insulin
in the body.;