Orientador: Albina Messias de Almeida Milani Altemani / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Ciencias Medicas / Made available in DSpace on 2018-08-13T00:26:10Z (GMT). No. of bitstreams: 1 Neves_CatarinadeOliveira_D.pdf: 1050550 bytes, checksum: fc3ca7c67f2a52e8450896158a67f0d6 (MD5) Previous issue date: 2009 / Resumo: CD10 e Podoplanina (D2-40), além de expressos nas células mioepiteliais, estão envolvidos na progressão tumoral e podem ser utilizados como marcadores prognósticos. Em 79 neoplasias salivares com diferenciação mioepitelial (44 malignas e 35 benignas), analisamos a expressão dessas proteínas nas células neoplásicas, na reação desmoplásica tumoral e, nos carcinomas adenóides císticos (CAC), verificamos possível correlação com fatores prognósticos. CD10 foi negativo nas células epiteliais em 100% dos casos. Nas mioepiteliais, foi positivo em 25,71% das lesões benignas e em 27,27% das malignas, sendo esses resultados significantemente inferiores àqueles da a-SMA (60% e 88,64%, respectivamente). CD10 foi positivo em 83,33%, 30%, 27,7% e 40% dos carcinomas epiteliais-mioepiteliais (CEME), adenomas pleomórficos, mioepiteliomas e carcinomas mioepiteliais, respectivamente, e negativo em 100% dos CAC, adenocarcinomas polimórficos de baixo grau (APBG) e adenomas de células basais. No estroma tumoral, a expressão do CD10 (38,64%) foi significantemente maior (p=0.007) que a da a-SMA (11,36%). Entretanto, a expressão do CD10 não apresentou correlação com os fatores prognósticos do CAC. O D2-40 foi negativo, nas células epiteliais e estromais, e positivo nas mioepiteliais em 59% dos carcinomas e em 42,86% das lesões benignas. Concluímos que, ao contrário do D2-40, o CD10 tem pouca utilidade para identificar células mioepiteliais malignas, exceto no CEME onde pode ser útil no diagnóstico diferencial com a variante tubular do CAC. Sua expressão estromal ocorre em células de fenótipo distinto dos miofibroblastos, está associada com invasão tumoral e não se correlaciona com fatores prognósticos do CAC. / AbstrAct: CD10 and Podoplanin (D2-40) are expressed in myoepithelial cells and, in addition, are involved in tumoral progression and can be utilized as prognostic markers. In a series of 79 salivary neoplasias with myoepithelial differentiation (44 malignant and 35 benign), the expression of these proteins was analyzed in tumor cells as well as in tumor-associated stromal cells and it was correlated with prognostic factors in a select group of lesions (adenoid cystic carcinomas). In epithelial cells, CD10 was negative in 100% of the cases. In myoepithelial cells, CD10 was positive in 25.71% of the benign neoplasias and in 27.27% of the malignant ones and this expressions was significantly lower in comparison to that of a-smooth muscle actin (a-SMA) (60% and 88.64%, respectively). In neoplasias classified according to histological subtype, CD10 was positive in 83.33%, 30%, 27.27% and 40% of epithelial-myoepithelial carcinomas (EMC), pleomorphic adenomas, myoepitheliomas and myoepithelial carcinomas, respectively and negative in 100% of adenoid cystic carcinomas (ACC), polymorphic low-grade adenocarcinomas (PLGA) and basal adenomas. In tumor-associated stromal cells, CD10 expression was significantly higher (p=0.007) than that of a-SMA (38.64% versus 11.36%). However, no correlation was detected between CD10 expression and prognostic factors in ACC. D2-40 was negative in epithelial cells and in tumorassociated stromal cells as well and positive in myoepithelial cells of carcinomas (59%) and benign lesions (42.86%). This reactivity in myoepithelial cells did not differ significantly of that using a-SMA as a marker, except for PLGA where D2-40 was negative. In conclusion, CD10 differs of D2-40 once it shows low utility to detect neoplastic myoepithelial cells. However, EMC is an exception and in this tumor, CD10 could be useful to separate this lesion from tubular variant of ACC. In the tumor-associated stroma, CD10 expression in non-myofibroblast cells seems to be associated with tumor invasion but it does not show correlation with prognostic factors in ACC. / Doutorado / Anatomia Patologica / Doutor em Ciências Médicas