Pautrier microabscess /pôtrēyā″/ [Lucien M.A. Pautrier, French dermatologist, 1876–1959; Gk, mikros, small; L, abscedere, to go away] , an accumulation of intensely staining mononuclear cells in the epidermis characterizing malignant lymphoma of the skin, especially mycosis fungoides. See also mycosis fungoides.