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Hormones Secreted by the Stomach01:25

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Gastritis is marked by disruption of the mucosal barrier that usually protects the stomach tissue from digestive juices and manifests in acute and chronic forms.
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Peptic ulcer disease (PUD) presents with diverse symptoms depending on the location and severity of the ulcer. Clinical manifestations of peptic ulcer include dull pain and a burning sensation in the mid-epigastric region.
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Peptic ulcers are sores on the stomach's inner lining and the upper small intestine, which are the result of disruptions in the mucosal layer that houses parietal cells which produce gastric acid, and chief cells which secrete pepsinogen.
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Gastric emptying occurs when the stomach gradually releases chyme into the duodenum. When the stomach is distended, it triggers the release of gastrin, a hormone that promotes gastric acid secretion to aid in digestion. Additionally, stomach distension contributes to peristaltic waves that propel gastric contents toward the pyloric region. The gastroenteric reflex, on the other hand, primarily stimulates peristalsis in the intestines, facilitating the movement of contents further along the...
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Gastric-type ampullary adenomas.

Badr AbdullGaffar1, Fatma B Zarooni1, Khalid Bamakramah1

  • 1Dubai Hospital, Dubai, United Arab Emirates.

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|October 7, 2025
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Summary
This summary is machine-generated.

Gastric-type adenomas of the ampullary duodenum are often overlooked but are neoplastic lesions with dysplasia. Distinguishing them from reactive polyps is crucial due to their potential for recurrence.

Keywords:
AdenomaAmpullaDuodenumFoveolarGastricPolypPyloric gland

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Area of Science:

  • Gastroenterology
  • Pathology
  • Oncology

Background:

  • Intestinal-type adenomas of the ampullary duodenum are well-characterized.
  • Gastric-type adenomas in this location are less recognized.
  • Limited data exists on the features of gastric-type ampullary adenomas.

Purpose of the Study:

  • Investigate the clinical, histopathologic, histochemical, and immunohistochemical features of gastric-type ampullary adenomas.
  • Compare gastric-type adenomas with intestinal-type adenomas and reactive polyps.
  • Clarify the diagnostic and clinical significance of gastric-type ampullary adenomas.

Main Methods:

  • Retrospective review of ampullary polyps over 15 years.
  • Analysis of clinical, histopathologic, histochemical (mucin expression), and immunohistochemical (CDX2, MUC proteins) features.
  • Comparison of gastric-type adenomas, intestinal-type adenomas, and reactive polyps.

Main Results:

  • Gastric-type adenomas (24%) were identified, showing distinct mucin expression (MUC5AC, MUC6) and cytoarchitectural patterns (foveolar, pyloric, mixed).
  • Intestinal-type adenomas (47%) expressed MUC2 and CDX2, while reactive polyps (29%) showed no neoplastic markers.
  • Misclassification occurred, with gastric-type adenomas mistaken for reactive polyps and vice versa. Gastric-type adenomas showed potential for recurrence and association with colonic adenomas.

Conclusions:

  • Gastric-type adenomas are not uncommon in the ampullary duodenum and require careful examination for accurate diagnosis.
  • Distinguishing gastric-type adenomas from reactive polyps is essential due to their neoplastic nature and risk of recurrence.
  • These findings highlight the importance of recognizing gastric-type adenomas for appropriate patient management and surveillance.