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Lichenoid purpura (of Gougerot and Blum) Mycosis fungoides (plaque stage) 1. Epidermis usually normal or slightly acanthotic 1. Epidermis often psoriasiform 2. No lymphocytes disposed as solitary units in the epidermal basal layer 2. Lymphocytes often disposed as solitary units in the basal layer 3. Small lymphocytes limited to the lower half of the epidermis […]