AIM to investigate the expression of proliferating cell nuclear antigen(p CNA)and E-cadherin in gastric carcinoma and to analyze their clinical significance.METHODS A total of 146 patients were selected for this study,including 38 patients with intestinal metaplasia,42with dysplasia,and 66 with primary gastric cancer.In addition,40 patients with normal gastric tissues were selected as controls.the expression of p CNA and E-cadherin was detected by immunohistochemistry.Differences in p CNA and the E-cadherin labeling indexes among normal gastric mucosa,intestinal metaplasia,dysplasia,and gastric carcinoma were compared.Subjects with normal gastric tissues were assigned to a normal group,while gastric cancer patients were assigned to a gastric cancer group.the difference in p CNA and E-cadherin expression between these two groups was compared.the relationship between expression of p CNA and E-cadherin and clinicopathological features was also explored in gastric cancer patients.furthermore,prognosis-related factors,as well as the expression of p CNA and E-cadherin,were analyzed in patients with gastric cancer to determine the 3-year survival of these patients.RESULTS the difference in p CNA and the E-cadherin labeling indexes among normal gastric mucosa,intestinal metaplasia,dysplasia,and gastric carcinoma was statistically significant(p<0.05).During the transition of normal gastric mucosa to gastric cancer,the p CNA labeling index gradually increased,while the E-cadherin labeling index gradually decreased(p<0.05).the p CNA labeling index was significantly higher and the E-cadherin labeling index was significantly lower in gastric cancer than in dysplasia(p<0.05).the expression of p CNA was significantly higher in the gastric cancer group than in the normal group,but E-cadherin was weaker(p<0.05).there was a negative correlation between the expression of p CNA and E-cadherin in gastric carcinoma(r=-0.741,p=0.000).p CNA expression differed significantly between gastric cancer patients with and without lymph node metastasis and between patients at different t stages.E-cadherin expression also differed significantly between gastric cancer patients with and without lymph node metastasis(p<0.05).High t stage and positive p CNA expression were risk factors for the prognosis of patients with gastric cancer(RR>1),while the positive expression of E-cadherin was a protective factor(RR<1).the sensitivity,specificity,and accuracy of p CNA positivity in predicting the 3-year survival of patients with gastric cancer were 93.33%,38.89%,and0.64,respectively;while these values for E-cadherin negativity were 80.0%,41.67%,and 0.59,respectively.When p CNA positivity and E-cadherin negativity were combined,the sensitivity,specificity,and accuracy were66.67%,66.67%,and 0.67,respectively.CONCLUSION Combined detection of p CNA and E-cadherin can improve the accuracy of assessing the prognosis of patients with gastric cancer. AIM to investigate the expression of proliferating cell nuclear antigen (p CNA) and E-cadherin in gastric carcinoma and to analyze their clinical significance. METHODS A total of 146 patients were selected for this study, including 38 patients with intestinal metaplasia, 42 with dysplasia, and 66 with primary gastric cancer. In addition, 40 patients with normal gastric tissues were selected as controls. The expression of p CNA and E-cadherin was detected by immunohistochemistry. Differences in p CNA and the E-cadherin labeling indexes among the normal gastric mucosa , intestinal metaplasia, dysplasia, and gastric carcinoma were compared to both normal gastric tissues were assigned to a normal group, while gastric cancer patients were assigned to a gastric cancer group. the difference in p CNA and E-cadherin expression between these two groups was compared. the relationship between expression of p CNA and E-cadherin and clinicopathological features was also explored in gastric cancer patients.furthermo re, prognosis-related factors, as well as the expression of p CNA and E-cadherin, were analyzed in patients with gastric cancer to determine the 3-year survival of these patients .RESULTS the difference in p CNA and the E-cadherin labeling indexes among normal gastric mucosa, intestinal metaplasia, dysplasia, and gastric carcinoma were significantly significant (p <0.05). decreased (p <0.05). The p CNA labeling index was significantly higher and the E-cadherin labeling index was significantly lower in gastric cancer than in dysplasia (p <0.05). The expression of pCNA was significantly higher in the gastric cancer group than in the normal group but E-cadherin was weaker (p <0.05) .here was a negative correlation between the expression of p CNA and E-cadherin in gastric carcinoma (r = -0.741, p = 0.000) differed significantly between gastriccancer patients with and without lymph node metastasis and between lymph nodes metastasis and between patients at different t stages. E-cadherin expression also differed significantly between gastric cancer patients with and without lymph node metastasis (p <0.05). High t stage and positive p CNA expression were risk factors for the prognosis of patients with gastric cancer (RR> 1), while the positive expression of E-cadherin was a protective factor (RR <1). the sensitivity, specificity, and accuracy of p CNA positivity in predicting the 3-year survival of patients with gastric cancer were 93.33%, 38.89%, and0.64, respectively; while these values ​​for E-cadherin negativity were combined 80.0%, 41.67%, and 0.59, respectively.When p CNA positivity and E-cadherin negativity were combined, the sensitivity, specificity, and accuracy were 66.67%, 66.67%, and 0.67, respectively. CONCLUSION Combined detection of p CNA and E-cadherin can improve the accuracy of assessing the prognosis of patients with gastric cancer.