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Images 10.2.1A: Perivascular dermatitis, spongiotic and slightly psoriasiform + 10.2.1B: Slight edema of the papillary dermis and scale-crust = Nummular dermatitis ¬†Changes such as these are indistinguishable from those of allergic contact dermatitis. The psoriasiform acanthosis is more than usually is seen in pityriasis rosea and its lookalike, erythema annulare centrifugum. 10.2.2A: Perivascular dermatitis, spongiotic […]