Clinical approach to cutaneous vasculitis.

Area of Science:

• Rheumatology
• Dermatology
• Immunology

Background:

• Vasculitis involves inflammation and destruction of blood vessel walls, leading to hemorrhagic and ischemic events.
• It can be primary or secondary to connective tissue disease (CTD), infections, or drug reactions.
• Cutaneous vasculitis often manifests as palpable purpura or infiltrated erythema, indicating small-vessel involvement.

Purpose of the Study:

• To provide a comprehensive overview of vasculitis, focusing on its cutaneous manifestations.
• To outline diagnostic approaches, including biopsy and direct immunofluorescence.
• To discuss current and emerging treatment strategies for various forms of vasculitis.

Main Methods:

• Review of literature on vasculitis classification, presentation, diagnosis, and treatment.
• Emphasis on histopathological findings from skin biopsies.
• Discussion of therapeutic options from conservative measures to advanced biologics.

Main Results:

• Cutaneous vasculitis presents diverse clinical features, from superficial purpura to deep ulcers and gangrene.
• Biopsy is crucial for diagnosis, with direct immunofluorescence aiding in subclassifying vasculitis (e.g., IgA vs. IgG/IgM).
• Treatment strategies are tailored to disease severity, including trigger avoidance, NSAIDs, colchicine, dapsone, corticosteroids, immunosuppressants, and biologics like rituximab.

Conclusions:

• Accurate diagnosis of cutaneous vasculitis relies on clinical presentation and histopathology, often requiring biopsy.
• Treatment requires a stepwise approach, escalating based on disease severity and organ involvement.
• Emerging biologic therapies offer new hope for refractory cases and specific vasculitic syndromes.