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Images 10.41.1A: Perivascular dermatitis, spongiotic psoriasiform + 10.41.1B: Lymphocytes only, edema of the papillary dermis, and parakeratosis = Gianotti-Crosti disease The changes pictured are nearly indistinguishable from those of allergic contact dermatitis and nummular dermatitis. Therefore, a sure diagnosis of Gianotti-Crosti disease can be made only in the context of correlation of the findings histopathologic […]