Estudo das alterações celulares sugestivas de malignidade no líquen plano bucal
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Data
2006-07-18
Autores
Sousa, Fernando Augusto Cervantes Garcia de [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
Ainda hoje muito se discute a respeito da natureza pré-maligna do líquen plano bucal. Neste contexto, o presente trabalho tem como objetivo analisar os tipos e o número de alterações celulares sugestivas de malignidade no líquen plano bucal, comparando-os com aqueles observados na displasia epitelial e no carcinoma epidermóide, através da microscopia de luz. As alterações mais frequentemente observadas no líquen plano bucal foram aumento da relação núcleo-citoplasma (93,33%); irregularidades ou espessamento da membrana nuclear (86,67%); multinucleações e multilobulações (86.67%) e aumento do tamanho e número dos nucléolos (83,33%). A análise de variância (ANOVA) seguida do teste de Tukey, ambos ao nível de significância de 5%, revelou não haver diferença estatisticamente significante entre o número médio de alterações celulares sugestivas de malignidade no líquen plano bucal (5,90l1,56) e na displasia epitelial (5,53l1,41), mas sim entre eles e o carcinoma epidermóide (7,60l1,81). Quanto aos tipos de alterações, também foi encontrada diferença estatística entre as três lesões avaliadas. Tais resultados, portanto, sugerem não haver semelhanças estatísticas entre os casos de líquen plano bucal, displasia epitelial e carcinoma epidermóide que comprovem a natureza pré-maligna do líquen plano bucal, pelo menos no que se refere aos tipos de alterações celulares sugestivas de malignidade avaliadas neste estudo.
Nowadays, a matter of great discussion is regarding the pre-malignant nature of oral lichen planus. Within this context, the present study has the objective of analyzing the types and number of malignancy suggestive cell alterations in oral lichen planus, comparing them with those observed in epithelial dysplasia and in squamous cell carcinoma, through light microscopy. The most frequent observed alterations in oral lichen planus were enhancement of nucleus-cytoplasm relation (93.33%); irregularities or thickening of nuclear membrane (86.67%); multinucleations or multilobuli (86.67%); and bigger and more numerous nucleolus (83.33%). Variance analysis (ANOVA) followed by Tukey test, both at 5% level of significance, revealed not to have statistically significant difference between the mean number of malignancy suggestive cell alterations in oral lichen planus (5.90l1.56) and in epithelial dysplasia (5.53.1.41), but between those and squamous cell carcinoma (7.60l1.81), this difference was present. Regarding the type of alterations, it was found statistical difference between the three evaluated lesions. Therefore, such results suggest no statistical semblances among the oral lichen planus cases, epithelial dysplasia and squamous cell carcinoma, which would confirm the pre-malignant nature of oral lichen planus, at least regarding the type and number of cell alterations evaluated in this study.
Nowadays, a matter of great discussion is regarding the pre-malignant nature of oral lichen planus. Within this context, the present study has the objective of analyzing the types and number of malignancy suggestive cell alterations in oral lichen planus, comparing them with those observed in epithelial dysplasia and in squamous cell carcinoma, through light microscopy. The most frequent observed alterations in oral lichen planus were enhancement of nucleus-cytoplasm relation (93.33%); irregularities or thickening of nuclear membrane (86.67%); multinucleations or multilobuli (86.67%); and bigger and more numerous nucleolus (83.33%). Variance analysis (ANOVA) followed by Tukey test, both at 5% level of significance, revealed not to have statistically significant difference between the mean number of malignancy suggestive cell alterations in oral lichen planus (5.90l1.56) and in epithelial dysplasia (5.53.1.41), but between those and squamous cell carcinoma (7.60l1.81), this difference was present. Regarding the type of alterations, it was found statistical difference between the three evaluated lesions. Therefore, such results suggest no statistical semblances among the oral lichen planus cases, epithelial dysplasia and squamous cell carcinoma, which would confirm the pre-malignant nature of oral lichen planus, at least regarding the type and number of cell alterations evaluated in this study.
Descrição
Palavras-chave
Carcinoma de celulas escamosas, Mucosa bucal, Líquen plano, Lichen planus
Como citar
SOUSA, Fernando Augusto Cervantes Garcia de. Estudo das alterações celulares sugestivas de malignidade no líquen plano bucal. 2006. 58 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Odontologia de São José dos Campos., 2006.