Occlusive cutaneous vasculopathies: rare differential diagnoses

Area of Science:

• Dermatology
• Vascular Medicine

Background:

• Occlusive cutaneous vasculopathies manifest as skin lesions such as retiform purpura and livedo racemosa.
• These conditions primarily involve vascular occlusion within the skin, with inflammation being a secondary effect, distinguishing them from cutaneous vasculitis.

Purpose of the Study:

• To delineate the clinical presentation and underlying causes of occlusive cutaneous vasculopathies.
• To emphasize the diagnostic importance of recognizing these vascular occlusive conditions, particularly when acral skin changes are present.

Main Methods:

• Clinical observation and case review focusing on patients with characteristic skin findings.
• Analysis of potential triggering factors including coagulopathies, emboli, and immune-mediated phenomena.

Main Results:

• Retiform purpura and livedo racemosa are key indicators of occlusive cutaneous vasculopathies.
• The lower extremities are commonly affected, but acral involvement necessitates consideration of these disorders.
• Identified triggers include coagulopathies, emboli, platelet/erythrocyte aggregates, cold agglutinins, and medications.

Conclusions:

• Occlusive cutaneous vasculopathies represent a distinct group of skin vascular disorders characterized by primary occlusion.
• Recognition of specific skin signs and consideration of diverse etiologies are crucial for diagnosis and management.
• Prompt evaluation is warranted, especially with acral skin changes, to identify underlying systemic or local causes.