Morphea-like tattoo reaction.

Tattoo reactions are histologically diverse. In general, dermal changes predominate, although epidermal changes such as acanthosis or spongiosis can also be seen. The chronic inflammatory cell infiltrate can be nodular, lichenoid, or granulomatous. Occasionally, the dermal infiltrate may be so dense as to suggest a diagnosis of cutaneous lymphoma. We report an unusual tattoo reaction that mimicked morphea histologically.