Contact Dermatitis, Allergic - DermAtlas

Contributor

Eric Ehrsam, MD

Diagnosis

contact dermatitis, allergic

Body Site

scalp shoulder ear neck

Age

25 years

Pigmentation

medium

Organization

discrete confluent

Color

red

Morphology

papulosquamous (bump, scale)

Pattern

symmetric generalized, disseminated

Comments

A 25-year-old woman consulted a dermatologist for an acute eczematous dermatitis on her head, neck and shoulders. The eruption appeared 5 days after she had black hair dye applied to her hair at the hairdresser. Patch tests were positive for para-phenylenediamine. Para-phenylenediamine is a dark dye used in almost all permanent hair dyes and some semi-permanent hair colouring. It is a potent allergen which triggers severe acute contact dermatitis in sensitized individuals.

Description

discrete and confluentred scaly weepy crusted papules and plaques

Image Added

5/18/2008 17:14:37

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Other Resources

PubMed Medline Plus Medscape

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