Les caractéristiques dermoscopiques de lichen plan et ses variantes topographiques.

Lichen planus is a heterogeneous chronic inflammatory dermatosis occurring in middle-aged adults. It can affect the skin, mucous membranes and dander. The pathophysiology involves an immune reaction mediated by T lymphocytes, which attack the basal keratinocytes inducing their apoptosis. Dermoscopy is a non-invasive examination allowing the visualization of structures, invisible to the naked eye, located at the epidermis, the dermo-epidermal junction and the dermis. In this article we describe the dermoscopic aspects of lichen planus and its topographic variants. [ABSTRACT FROM AUTHOR]