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Diagnostic p53 expression in gastric endoscopic mucosal resection
1Department of Pathology, College of Medicine, Dankook University, Chunan, Korea. jhcho@anseo.dankook.ac.kr
Journal of Korean Medical Science
|September 15, 1999
Summary
p53 immunostaining aids in diagnosing gastric cancer. This method helps identify cancerous cells in endoscopic mucosal resection samples, differentiating them from adenomas for better treatment planning.
Area of Science:
- Gastroenterology
- Oncology
- Pathology
Background:
- Endoscopic mucosal resection (EMR) is standard for intramucosal gastric cancers.
- Histological examination of EMR specimens is crucial for treatment decisions.
Purpose of the Study:
- To assess the diagnostic value of p53 expression in gastric EMR samples.
- To evaluate p53's utility in differentiating gastric adenomas from carcinomas.
Main Methods:
- Immunohistochemical staining for p53 expression.
- Analysis of 24 gastric carcinomas and 20 adenomas resected via EMR.
Main Results:
- Strong p53 expression observed in 59% of intestinal-type gastric adenocarcinomas.
- p53 immunostaining effectively identified residual carcinoma cells at resection margins.
- Microscopic carcinoma, multifocal involvement, and submucosal invasion were clearly demarcated by p53 expression.
- Adenomas showed diffuse weak p53 expression, significantly different from carcinomas (p<0.001).
Conclusions:
- p53 immunostaining is a valuable tool for histological examination of gastric EMR samples.
- Combined histological evaluation and p53 immunostaining improve diagnostic accuracy for intestinal-type gastric carcinomas.
- p53 expression serves as a differential diagnostic marker between gastric adenomas and carcinomas.