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Allergic contact dermatitis, spongiosis, patch tests, red ink, tattoo Keywords: allergic contact dermatitis; spongiosis; patch tests; red ink; tattoo EN allergic contact dermatitis spongiosis patch tests red ink tattoo 453 454 2 05/06/21 20210601 NES 210601 Complications with red tattoo ink (RTI) can be cutaneous or systemic. [Extracted from the article]

Palmoplantar pustulosis (PPP) is a chronic and relapsing disease of the palms and soles, which tends to be difficult to treat. Classically it was described as a subtype of psoriasis. Nowadays it is regarded as a separate entity, although plaque-type psoriasis affects concomitantly many patients with PPP. A link between allergic contact dermatitis (ACD) and PPP has been described, and the former may encompass a potential to perpetuate the latter. Hereby we report two cases of difficult to treat plantar pustulosis. Underneath the dermatosis's refractive nature was an allergic sensitization to potassium dichromate and cobalt chloride. Leather shoes and leather insoles were commonly worn, and both allergens are employed by the leather industry. Clinical remission was achieved in both cases with allergen eviction. Patch testing must be considered in cases of PPP without response to treatment. If relevant sensitization is found, allergen eviction measures are mandatory. [ABSTRACT FROM AUTHOR]