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[Delayed type allergic reaction to red azo dye in tattooing]
1Hautklinik, Städtischen Krankenhaus GmbH Hildesheim.
Summary
Allergic reactions to red tattoo pigments, often aromatic azo dyes, can cause granulomatous inflammation and scarring. A patient showed a positive reaction to a specific azo dye and Napthol AS.
Area of Science:
- Dermatology
- Toxicology
- Immunology
Background:
- Allergic reactions to tattoo pigments are rare, with red dyes historically linked to mercury and cadmium compounds.
- Recent findings implicate synthetic inorganic azo dyes as causative agents in tattoo-related allergic reactions.
Observation:
- A 42-year-old male presented with allergic reactions localized to red tattoo areas.
- Histopathological examination revealed chronic granulomatous inflammation with pigment granule elimination, depigmentation, and scarring.
Findings:
- The tattoo pigment was identified as an aromatic azo derivative.
- The patient exhibited a positive cutaneous reaction to the azo dye and a positive patch test to Napthol AS, a dye coupling agent.
Implications:
- This case highlights the role of synthetic azo dyes in tattoo allergies.
- Understanding the specific chemical culprits, like Napthol AS, is crucial for diagnosis and prevention of adverse tattoo reactions.