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Related Experiment Videos

Contact hypersensitivity in hand dermatitis.

Lin-feng Li1, Jing Wang

  • 1Department of Dermatology, Peking University The Third Hospital, Beijing, People's Republic of China. zoonli@163.net

Contact Dermatitis
|December 21, 2002
PubMed
Summary
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Contact hypersensitivity (CHS) is less prevalent in hand dermatitis (HD) compared to other allergic contact dermatitis. Patch testing (PT) is crucial for diagnosing CHS in chronic HD, especially in vesicular and hand-foot forms.

Area of Science:

  • Dermatology
  • Allergology
  • Immunology

Background:

  • Hand dermatitis (HD) is a common condition with various etiologies.
  • Contact hypersensitivity (CHS) is a significant cause of allergic contact dermatitis.
  • The role of CHS in HD requires further elucidation.

Purpose of the Study:

  • To compare the prevalence of CHS in hand dermatitis (HD) versus non-hand dermatitis (NHD).
  • To identify common allergens in HD patients.
  • To evaluate the utility of patch testing (PT) in different clinical forms of HD.

Main Methods:

  • Patch testing (PT) was performed on 105 adult HD patients and 361 NHD patients.
  • A questionnaire was used to investigate suspected offending agents.
  • HD cases were categorized into vesicular, fissured, hyperkeratotic, hand and foot dermatitis (HFD), and pompholyx forms.

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Main Results:

  • The overall PT positivity rate was lower in HD (46.7%) than in NHD (63.2%).
  • Common allergens in HD included rubber mix, p-phenylenediamine (PPD), and fragrance mix. Nickel allergy was less frequent in HD.
  • CHS played a role in vesicular HD, HFD, and some fissured HD, but was less common in hyperkeratotic HD and pompholyx.

Conclusions:

  • CHS is less common in HD than in NHD, suggesting other factors like skin irritation may be more significant.
  • Nickel allergy is less prevalent in HD patients.
  • Patch testing is recommended for all chronic HD patients, particularly those with vesicular, fissured, or HFD presentations.