Contact dermatitis as a systemic disease.

Area of Science:

• Dermatology
• Immunology
• Allergology

Background:

• Systemic contact dermatitis (SCD) is a T-cell mediated hypersensitivity reaction.
• It arises from systemic allergen re-exposure via various routes.
• Common triggers include nickel, antibiotics, corticosteroids, and plant allergens.

Purpose of the Study:

• To describe the mechanisms, common allergens, and clinical presentations of SCD.
• To differentiate SCD from Symmetric Drug-related Intertriginous and Flexural Exanthema (SDRIFE).

Main Methods:

• Review of existing literature on systemic contact dermatitis.
• Analysis of allergen routes of administration and hypersensitivity mechanisms.
• Description of clinical presentations, including baboon syndrome and SDRIFE.

Main Results:

• SCD involves systemic uptake of allergens, leading to delayed hypersensitivity.
• Baboon syndrome, characterized by erythema in specific body folds, is a typical presentation.
• SDRIFE describes similar presentations caused by drugs without prior sensitization.

Conclusions:

• Understanding SCD mechanisms and triggers is crucial for diagnosis and management.
• Corticosteroids are notable triggers, capable of inducing sensitization and SCD.
• Differentiating SCD and SDRIFE aids in accurate clinical diagnosis and treatment strategies.