[Heterotopic gastric mucosa in duodenum: endoscopic and histological features]

Area of Science:

• Gastroenterology
• Pathology
• Endoscopy

Background:

• Heterotopic gastric mucosa (HGM) is gastric tissue found outside the stomach.
• Its presence in the duodenum requires careful characterization to distinguish it from other duodenal pathologies.

Purpose of the Study:

• To characterize heterotopic gastric mucosa found in the duodenum.
• To establish diagnostic criteria and understand its clinical significance.

Main Methods:

• Retrospective review of duodenal biopsy slides diagnosed with HGM between 2014-2015.
• Collection and analysis of clinical, histological, and endoscopic data for each case.

Main Results:

• 45 cases of duodenal HGM were identified.
• HGM was predominantly located in the duodenal bulb (91.1%) and frequently presented as polyps (73.2%).
• Parietal cells were the primary diagnostic criterion; Helicobacter pylori and dysplasia were absent.

Conclusions:

• Duodenal HGM is a non-neoplastic condition.
• It should be considered in the differential diagnosis of duodenal polyps.
• Parietal cell identification is crucial for differentiating HGM from peptic duodenitis.