Abstract
Epidermal mononuclear cell infiltrate form 3 patients with pagetoid reticulosis was examined for the presence of the cytoplasmic markers lysozyme, .alpha.1-antitrypsin and .alpha.1-antichymotrypsin, using specific antisera and a peroxidase-antiperoxidase technique. Many of the infiltrating cells possessed these markers, indicating that they belonged to the monocyte-macrophage-histiocyte series.