title: Merkel cell carcinomas with CK20 negative and CK7 positive immunostaining.
authors.forename: Trever W
authors.initials: TW
authors.lastname: Beer
mesh_terms: D000368:Aged; D014408:Biomarkers, Tumor / Q000032:analysis; D015266:Carcinoma, Merkel Cell / Q000378:metabolism* / Q000473:pathology*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D016130:Immunophenotyping; D053554:Keratin-20 / Q000378:metabolism*; D053552:Keratin-7 / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D012878:Skin Neoplasms / Q000378:metabolism* / Q000473:pathology*
chemical_list: D014408:Biomarkers, Tumor; D053554:Keratin-20; D053552:Keratin-7