Liquen plano, a propósito de un caso poco frecuente

Lichen planus is a relatively common papulosquamous eruption in middle age and characterized by small, purple, polygonal, pruritic papules very flat surface. The etiology of lichen planus is unknown hence the interest in describing the clinical, histopathological, and laboratory results. We present a rare case of a caucasian man with generalized lichen longstanding plane whose diagnosis was consistent with lichenoid adverse drug reaction. Involvement in hands and feet is another unusual sign that can lead to confusion with the presence of secondary syphilis. The slow but inexorably atypical clinical presentation similar to other large clinical entities aspect necessitated a thorough physical examination and complementary. Surgical biopsy and histologic confirmation that stood in the papillary dermis lymphocytic inflammatory infiltrate in band contacted the basal layer of the epidermis that had determined the diagnosis apoptotic keratinocytes. Lichen planus may present diagnostic difficulty, biopsy of the lesion in atypical presentations allows diagnosis, has a favorable prognosis, and healing.