Gastric Cancer and p53 Overexpression
Author Information
Author(s): Y. Kakeji, D. Korenaga, S. Tsujitani, H. Baba, H. Anai, Y. Maehara, K. Sugimachi
Primary Institution: Kyushu University
Hypothesis
Does overexpression of the p53 gene in gastric cancer correlate with increased metastasis to lymph nodes?
Conclusion
Gastric cancer with p53 overexpression is associated with a higher rate of metastasis to lymph nodes.
Supporting Evidence
- 54% of primary gastric carcinomas showed abnormalities in p53 expression.
- 85% of p53 positive tumors metastasized to lymph nodes compared to 64% of negative tumors.
- 92% of malignant cells in metastatic lymph nodes stained positively for p53.
- 69% of aneuploid tumors were in the p53 positive group.
- Ki-67 labeling showed higher proliferative activity in p53 positive tumors.
Takeaway
If a stomach cancer has a lot of a certain protein called p53, it is more likely to spread to nearby lymph nodes.
Methodology
The study examined p53 expression in 96 primary gastric carcinomas and 26 metastatic lymph nodes using immunohistochemistry.
Limitations
The follow-up period was only 1-3 years, limiting conclusions about long-term prognosis.
Participant Demographics
Patients included 96 unselected individuals with primary gastric cancer, with no preoperative treatment.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
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