Small bowel (small intestine)
Congenital anomalies
Heterotopic gastric mucosa


Topic Completed: 1 August 2012

Revised: 8 March 2019

Copyright: 2003-2019, PathologyOutlines.com, Inc.

PubMed Search: Heterotopic gastric mucosa small bowel[TIAB]
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Cite this page: Gulwani H. Heterotopic gastric mucosa. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/smallbowelheterotopicgastric.html. Accessed May 24th, 2019.
Definition / general
  • Mature gastric tissue in location where normally not found (i.e. small bowel)
  • Discrete small nodules or sessile polyps, usually in duodenum (first and second part)
  • May cause obstruction, diarrhea, ulceration, bleeding, perforation, intussusception, pain (Pediatr Dev Pathol 2000;3:277)
Case reports
Gross images

Case of the Week #124

Various images



Images hosted on other servers:

Figure 1

Microscopic (histologic) description
  • Mature gastric tissue, usually fundic type mucosa with chief and parietal cells, lined by foveolar epithelium, with a full mucosal thickness, forming a mucosal island
  • Divided into two subtypes, one lined by foveolar epithelium only (congenital or acquired) and another foveolar epithelium along with fundic glands (congenital only) (Int J Clin Exp Pathol 2012;5:46)
  • Gastric metaplasia in the duodenum is associated with H. pylori infection and is probably not congenital (Hum Pathol 2003;34:156)
Microscopic (histologic) images

Contributed by
Andrey Bychkov, M.D., Ph.D.

Fundic mucosa in duodenum

 


Case of the Week #124

Various images



Images hosted on other servers:

Various images

Differential diagnosis
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