Behçet's disease: review with emphasis on dermatological aspects.

Area of Science:

• Immunology
• Genetics
• Rheumatology

Background:

• Behçet's disease is a systemic vasculitis with unknown etiology.
• Strong association with HLA-B51 suggests a genetic component.
• Environmental factors likely play a role in disease development.

Purpose of the Study:

• To review the etiopathogenesis, clinical manifestations, and diagnostic approaches for Behçet's disease.
• To discuss the role of genetic and environmental factors in Behçet's disease.
• To highlight the importance of mucocutaneous manifestations and diagnostic indexes.

Main Methods:

• Literature review of etiopathogenesis, clinical features, and treatment of Behçet's disease.
• Analysis of genetic associations, including HLA-B51 and MICA.
• Review of immunological findings, such as Th1/Th17 responses and cytokine profiles (IL-21).

Main Results:

• Behçet's disease involves genetic susceptibility (HLA-B51) and environmental triggers (e.g., infections).
• Immune system dysregulation includes increased Th1/Th17 responses and IL-21 production.
• Mucocutaneous manifestations (ulcers, skin lesions, pathergy) are key diagnostic markers, with early onset indicating poorer prognosis.

Conclusions:

• Behçet's disease pathogenesis is multifactorial, involving genetic predisposition and immune system activation.
• Early recognition of mucocutaneous signs is crucial for diagnosis and prognosis.
• Further validation of activity indexes like the Mucocutaneous Activity Index is needed for effective management.