Abstract
In 4 cases of lichen ruber planus, fibrin was demonstrated using the immunohistochemical technique described by Avrameas. In accordance with the results obtained by immunofluorescent microscopy, fibrin deposits could be revealed in a band-like pattern at the dermo-epidermal junction, as intra- and pericapillary masses and round- or ovoid-shaped bodies in the papillary region and basal layer of the epidermis.