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Informações do antígeno
A citoqueratina 20 tem demonstrado ser quase totalmente confinada ao epitélio gástrico e intestinal, urotélio e células de Merkel da pele. A citoqueratina 20 é menos ácida do que outras citoqueratinas de tipo I, e é de interesse devido à sua expressão de tecido restrita.
No tecido normal, citoqueratina 20 é expressa no epitélio intestinal, epitélio foveolar gástrico, em um número de células endócrinas, nas porções superiores da glândula pilórica, urotélio e nas células de Merkel da epiderme.
Em tumores onde é relatada, há uma diferença acentuada na expressão da citoqueratina 20 entre carcinomas diferentes.
Neoplasias expressando citoqueratina 20 são derivadas do epitélio normal, que foram expressas em citoqueratina 20.
Carcinomas colorretais expressam consistentemente citoqueratina 20, enquanto adenocarcinomas gástricos expressam citoqueratina 20 em um grau menor.
Adenocarcinoma da vesícula biliar e do ducto biliar, adenocarcinoma de células ductais do pâncreas, tumores mucinosos do ovário, tumores de células de Merkel e carcinomas de células transicionais também foram relatadas expressar citoqueratina 20.
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