[Epithelial dysplasia in oral lichen planus].

The oral lichen planus constitutes one of the white injuries more frequent than they appear in the oral mucosa and it is considered that it has certain risk of malignant transformation, recognising the presence of epithelial dysplasia like predicting histological of these changes. The occurrence of epithelial dysplasia, as a possible precursor of malignant transformation, has been studied scarcely in oral lichen. The aim of the present study was to define some histological characteristics of this type of lesion, according the grade of severity with special respect to epithelial dysplasia.