Poroqueratosis punctata: reporte de un caso y revisión de la literatura [Punctate porokeratosis: Case report and review of the literature]

We present the case of a 63-year-old woman with a one-year history of punctiform, hyperkeratotic lesions on the palms of both hands. The histologic examination showed the presence of a cornoid lamella and allowed the establishment of the diagnosis of punctate porkeratosis. Porokeratosis is a clonal disorder of keratinization that exhibits multiple forms of presentation, with punctate porokeratosis being an infrequent form. The differential diagnosis of palmo-plantar punctiform, hyperkeratotic lesions is composed of porokeratosis punctata, the spiny keratodermas, other p