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The relationship between CD30+ lymphoma and epithelial proliferations is not well defined. CD30+ lymphoma and lymphomatoid papulos (LyP) share immunohistochemical epitopes and some other features. A single case of LyP associated with multiple keratoacanthomas (KAs) was recently reported. We report two cases of atypical lymphocytic proliferation with features of CD30+ lymphoma and LyP intimately associated to KA and squamous cell carcinoma (SCC), KA type. This similar combination of an epidermal tumor and apparent involvement with atypical lymphocytic infiltrates raises the possibility of an association between the two entities. We speculate that the association may be more than expected to occur by chance and suggest several mechanisms by which the association may evolve.
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