Somatostatinomas are a rare type of neuroendocrine tumor. They may represent around 1% of all gastro-entero-pancreatic endocrine neoplasms.

The presentation can be variable. Patients with functional somatostatinoma may present with an "inhibitory syndrome" which is a triad of mild diabetes mellitus, cholelithiasis, and diarrhea/steatorrhea. Other lesions can present with obstructive pancreatitis.

They typically occur in the pancreas but can also manifest in extrapancreatic organs (e.g. duodenum and ampulla of Vater) and can result in chronic obstructive pancreatitis.

They may be functional (i.e patients have high fasting somatostatin levels) or non-functional. Functional somatostatinomas can release excessive amounts of somatostatin 2.

As they share the radiographic features of other pancreatic endocrine tumors, please refer to this parental article for a detailed discussion regarding these features.

Most somatostatinomas are malignant and are often associated with regional and/or portal metastases at the time of diagnosis 7.

Pancreatic pathology
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Article information

rID: 37069
Section: Gamuts
Synonyms or Alternate Spellings:
  • Somatostatinomas

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