Ampulla of Vater
Other malignancies

Author: Hanni Gulwani, M.D. (see Authors page)

Revised: 24 February 2016, last major update December 2012

Copyright: (c) 2003-2016,, Inc.

PubMed Search: Carcinoid[title]
Cite this page: Carcinoid. website. Accessed April 23rd, 2017.
Definition / General
Case Reports
Micro Description
  • Classic features of carcinoid tumors; somatostatin producing tumors are often mucin+
Micro Images

Monotonous tumor cells with small round nuclei plus various images

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