Ampulla of Vater
Other malignancies

Topic Completed: 1 December 2012

Revised: 27 June 2019

Copyright: (c) 2003-2019,, Inc.

PubMed Search: Carcinoid[title]

Hanni Gulwani, M.B.B.S.
Page views in 2018: 131
Page views in 2019 to date: 165
Cite this page: Gulwani H. Carcinoid. website. Accessed October 22nd, 2019.
Definition / general
Case reports
Microscopic (histologic) description
  • Classic features of carcinoid tumors; somatostatin producing tumors are often mucin+
Positive stains
  • Chromogranin (60%), synaptophysin (60%), gastrin (20% vs. 75% of duodenal carcinoids, Hum Pathol 2001;32:1252)
  • Also somatostatin and pancreatic polypeptide
Differential diagnosis
  • Adenocarcinoma
Additional references
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