Patch test reaction to <i>p</i>‐phenylenediamine can persist for more than 1 month

SummaryThe present guideline summarizes all aspects of patch testing for the diagnosis of contact allergy in patients suspected of suffering, or having been suffering, from allergic contact dermatitis or other delayed-type hypersensitivity skin and mucosal conditions. Sections with brief descriptions and discussions of different pertinent topics are followed by a highlighted short practical recommendation. Topics comprise, after an introduction with important definitions, materials, technique, modifications of epicutaneous testing, individual factors influencing the patch test outcome or necessitating special considerations, children, patients with occupational contact dermatitis and drug eruptions as special groups, patch testing of materials brought in by the patient, adverse effects of patch testing, and the final evaluation and patient counselling based on this judgement. Finally, short reference is made to aspects of (continuing) medical education and to electronic collection of data for epidemiological surveillance.

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“…Uchida et al. reported a case with a positive patch test reaction to PPD that persisted for >1 month . Gold chloride 0.5% aq.…”

Section: Potential Adverse Effects Of Patch Testingmentioning

confidence: 99%

“…A positive patch test reaction can sometimes persist for up to several weeks. Uchida et al reported a case with a positive patch test reaction to PPD that persisted for >1 month (143). Gold chloride 0.5% aq.…”

Section: Persisting Reactionmentioning

confidence: 99%

European Society of Contact Dermatitis guideline for diagnostic patch testing – recommendations on best practice

et al. 2015

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“…2 LLAPTRs to PPD and DY3 have been described. 3,4 However, writing-original draft; writing-review and editing.…”

Section: Discussionmentioning

confidence: 99%

Concomitant long‐lasting allergic patch test reactions to p‐phenylenediamine and textile azo dyes

Mancuso

2020

Contact Dermatitis

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“…Long‐lasting allergic patch test reactions (LLAPTR) are positive patch test reactions persisting more than 2 weeks after application of the allergens 1 . LLAPTR are common, but the precise pathogenesis is still unknown.…”

Section: Figurementioning

confidence: 99%

Long‐lasting allergic patch test reactions to dental metal allergens in a patient with palmoplantar pustulosis and pustulotic arthro‐osteitis

Kato

Oiso

Yanagihara

et al. 2020

The Journal of Dermatology

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Patch test reaction to p‐phenylenediamine can persist for more than 1 month

Cited by 8 publications

References 3 publications

European Society of Contact Dermatitis guideline for diagnostic patch testing – recommendations on best practice

European Society of Contact Dermatitis guideline for diagnostic patch testing – recommendations on best practice

Concomitant long‐lasting allergic patch test reactions to p‐phenylenediamine and textile azo dyes

Long‐lasting allergic patch test reactions to dental metal allergens in a patient with palmoplantar pustulosis and pustulotic arthro‐osteitis

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