Well-differentiated Neuroendocrine Neoplasm, Ampulla



Well-differentiated Neuroendocrine Neoplasm, Ampulla


Vikram Deshpande, MD









A well-circumscribed, well-differentiated neuroendocrine tumor is seen involving the distal portion of the bile duct. The lumen of the bile duct image is narrowed.






A gastrinoma of the periampullary region infiltrates the overlying duodenal mucosa image. The neoplastic cells in this neuroendocrine tumor are monotonous.


TERMINOLOGY


Abbreviations



  • Well-differentiated neuroendocrine neoplasm (WDNEN)


Synonyms



  • Carcinoid tumor


ETIOLOGY/PATHOGENESIS


Syndromic Cases



  • Neurofibromatosis



    • Majority are somatostatinomas


  • MEN1 and Zollinger-Ellison syndrome



    • Gastrinoma or nonfunctional tumor


Nonsyndromic Cases



  • Unknown

Jul 7, 2016 | Posted by in PATHOLOGY & LABORATORY MEDICINE | Comments Off on Well-differentiated Neuroendocrine Neoplasm, Ampulla
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