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Atrophic lichen planus and atrophic discoid lupus erythematosus pose problems in differential diagnosis histopathologic because they have several findings in common, among them compact orthokeratosis, focal hypergranulosis, epidermis thinned and associated with flat rete ridges and dermal papillae, vacuolar alteration along the dermoepidermal junction, individual necrotic keratocytes, infiltrates of lymphocytes of variable density, melanophages, and […]