Contact pemphigus: does it exist?

Area of Science:

• Dermatology
• Toxicology
• Immunology

Background:

• Contact pemphigus is a controversial skin condition characterized by blistering at sites of chemical contact.
• Despite recognition for over 50 years, its existence is debated within the medical community.
• Numerous substances, including pesticides, topical medications, and cosmetics, have been implicated as etiological factors.

Purpose of the Study:

• To summarize current knowledge regarding contact pemphigus.
• To identify and review chemicals responsible for its etiology.
• To explore the potential mechanisms underlying the disease.

Main Methods:

• Literature review of existing studies on contact pemphigus.
• Analysis of reported cases and implicated chemical agents.
• Discussion of proposed pathomechanisms.

Main Results:

• Pemphigus developing at the site of localized skin contact with various chemicals is defined as contact pemphigus.
• A wide range of chemicals, including pesticides, topical drugs (e.g., imiquimod, ketoprofen, phenol), cosmetics, and garlic, have been identified as potential causes.
• The review emphasizes the mechanisms by which these chemicals may elicit the disease.

Conclusions:

• Contact pemphigus is a distinct dermatological entity, though its controversial nature persists.
• Understanding the specific chemicals and their mechanisms is crucial for diagnosis and management.
• Further research is needed to definitively establish the disease and its pathogenesis.