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The gastric cardia: to be or not to be?
Jose J Derdoy1, Ari Bergwerk, Hartley Cohen
1Department of Pediatrics, Division of Gastroenterology and Nutrition, Children's Hospital Los Angeles, 4650 Sunset Boulevard, Los Angeles, CA 90027, USA.
Insights
Cardiac gastric mucosa is a normal finding at birth, present in all infants studied. Its presence does not necessarily indicate gastroesophageal reflux disease or abnormal metaplasia.
Area of Science:
- Pediatric Pathology
- Gastroenterology
- Developmental Biology
Background:
- The origin of cardiac gastric mucosa is debated, with theories suggesting it's either native tissue or a metaplastic response to reflux.
- Understanding its presence is crucial for accurate diagnosis of gastrointestinal conditions.
Purpose of the Study:
- To determine the existence, characteristics, and length of pure cardiac mucosa at the esophagogastric junction in pediatric autopsy samples.
- To investigate the relationship between cardiac mucosa length and patient age or gender.
Main Methods:
- Examination of 100 pediatric autopsy samples.
- Histological evaluation of the esophagogastric junction to identify and measure cardiac mucosa.
- Correlation analysis of mucosa length with patient age and gender.
Main Results:
- Cardiac mucosa was identified in all 100 samples, ranging from 0.1 to 3 mm in length (mean 1 mm).
- A significant inverse correlation was observed between patient age and cardiac mucosa length.
- No metaplastic features or Helicobacter pylori were found, and only mild esophagitis/gastritis in a few cases.
Conclusions:
- Cardiac mucosa represents a normal developmental zone at the esophagogastric junction, present from birth.
- The presence of cardiac mucosa in biopsy samples does not automatically signify a metaplastic response to gastroesophageal reflux disease.
Abstract:
The origin and biologic significance of cardiac gastric mucosa are controversial. Traditionally, it has been considered native mucosa and part of normal foregut development. It has been recently suggested that cardiac mucosa is present only as a metaplastic response to gastroesophageal reflux disease and therefore always abnormal. We evaluated the esophagogastric junction in 100 pediatric autopsy samples to determine the existence, characteristics, and length of pure cardiac mucosa at different ages. No patient had a history of gastroesophageal reflux disease. Cardiac mucosa immediately distal and contiguous to the esophageal squamous mucosa was identified in all 100 samples, varying in length from 0.1 to 3 mm; the mean length was 1 mm. There was an inverse correlation between patient age and length of cardiac mucosa; gender had no influence on measured length. Three patients had mild to moderate histologic esophagitis; two had gastritis. No metaplastic features or Helicobacter pylori were identified. These findings support the concept that there is a normal, variably narrow developmental zone at the esophagogastric junction covered by cardiac mucosa and is present at birth. When cardiac type mucosa is found in biopsy material, it does not necessarily represent evidence of a mucosal metaplastic response to gastroesophageal reflux disease.