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Insulinoma | Pancreatic Tumor |

An insulinoma is a small tumor in the pancreas These tumors make extra insulin -- more than your body can use. This causes blood sugar levels to drop too low An insulinoma is a neuroendocrine tumor, deriving mainly from pancreatic islet cells, that secretes insulin. Some insulinomas also secrete other hormones, such as gastrin, 5-hydroxyindolic acid, adrenocorticotropic hormone (ACTH), glucagon, human chorionic gonadotropin, and somatostatin. The tumor may secrete insulin in short bursts, causing wide fluctuations in blood levels. About 90% of insulinomas are benign. Approximately 10% of insulinomas are malignant Approximately 10% of patients have multiple insulinomas;