BLASCHKOLINEAR LICHEN NITIDUS IN A PATIENT WITH COMMON VARIABLE IMMUNODEFICIENCY

Abstract

Lichen Nitidus is a chronic idiopathic immunologically-driven dermatosis that is characterized on the clinical domain by shiny, flesh-colored micropapules and, pathologically, by a lymphohistiocytic dermal infiltrate with hydropic degeneration of the basal layer or, on occasions, inflammation with granulomatous features. The infiltrate fulfills and distorts the papillary dermis, compress the overlying atrophic epidermis and is laterally confined by elongated epidermal ridges in a "baseball and glove" appearance. The case of a Common Variable Immunodeficiency patient that developed lichen nitidus in a strictly blaschkolinear distribution is reported. Semiological details foster in this case a discussion on the nosological positioning of lichen nitidus among the lichenoid dermatoses.