forty nasopharyngeal carcinomas ( npc ) were studied by immunohistochemistry using an antibody to involucrin and the following three keratin antibodies : ( 1 ) an antibody to low molecular weight keratin reactive with nonsquamous epithelium , ( 2 ) a high molecular weight keratin antibody reactive with suprabasal squamous epithelium , and ( 3 ) a keratin antibody reactive with full thickness stratified epithelium .
C2931822
nasopharyngeal carcinomas
C0014609
epithelium