CDH1 and carcinoma: However, no statistically significant difference was found between the three different groups of carcinomas studied with regard to epithelial expression of β-catenin (Table 2).In addition to clinically detected positive lymph nodes, no statistically significant correlation between microscopically confirmed positive lymph nodes (pN) and E-cadherin and β-catenin immunostaining was established in the three SCC groups studied.