Overview
Definition
Most common childhood vasculitis.
Epidemiology
Varies globally depending on genetics, environment, or exposure.
Etiology & Risk Factors
- IgA immune complex deposition, often post-URI.
Clinical Symptoms
- Palpable purpura on buttocks/legs
- colicky abdominal pain
- arthritis.
Clinical Approach
Diagnosis
- Clinical
- Skin/Renal biopsy (IgA deposition).
Management
- Supportive care (NSAIDs)
- Steroids for severe GI/renal disease.
Complications
- Intussusception
- IgA nephropathy.