CDH1 and fibroepithelial polyp: In this study, we have assessed expression and localisation of E-cadherin, EMP1, 5T4, N-cadherin and CD44 in normal tissue, fibroepithelial polyp, low-grade dysplasia, high-grade dysplasia, T1 OSCC and T4 OSCC biopsies using fully characterised antibodies and immunofluorescence microscopy to determine cellular localisation and quantitative spatiotemporal expression.