Histopathology of Red Tattoo Reactions

Abstract

In this cohort we demonstrated that cutaneous reactions to red tattoo ink are frequently characterized by the combination of dermal predominantly histiocytic infiltrates and epidermal interface dermatitis. Allergic reactions to red tattoo pigments probably represent a combination of a subtype IVa and IVc allergic reaction. Clinicians should be aware of the specific histopathology of these reactions and therefore the importance of taking a diagnostic skin biopsy.