major histocompatibility complex ( mhc ) class i antigenic expression was examined on epithelial cell surfaces in normal oral mucosa , non-specific oral keratoses , dysplastic epithelium adjacent to carcinomas and in invasive tumour islands of squamous cell carcinomas , using antibodies to hla-a , b , c shared determinant antigen and beta 2 microglobulin ( beta 2m ) .
C0014609
epithelium
C0007097
carcinomas