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Immunoglobulin A vasculitis — Clinical Guidelines

Overview

Immunoglobulin A vasculitis (IgAV) is the most common systemic vasculitis in children, characterized by purpura, arthritis, abdominal pain, and renal involvement. In adults, it presents less frequently but with a more severe course, often including significant renal complications 1 3.

Diagnosis

Clinical Presentation: Cutaneous purpura, arthralgia/arthritis, abdominal pain, and renal symptoms 1.

Laboratory Tests: Elevated IgA levels, proteinuria, hematuria, and sometimes elevated inflammatory markers 1.

Imaging: Renal ultrasound may show abnormalities in cases with nephritis 1.

Renal Biopsy: Recommended for definitive diagnosis of renal involvement 1.

Management

First-Line Treatment: Corticosteroids for moderate to severe disease 1.

Adjunctive Therapies: Immunosuppressive agents like cyclophosphamide are controversial in adults; rituximab shows potential efficacy in severe cases 3.

Supportive Care: Pain management, hydration, and monitoring for complications 1.

Special Populations

Pediatrics: Diagnosis and management guidelines exist, emphasizing corticosteroids for severe cases 1.

Adults: More severe course; immunosuppressive therapy remains debated, with rituximab emerging as a potential option 3.

Key Recommendations

Use corticosteroids for children with moderate to severe IgAV (Evidence: Strong 1).

Consider renal biopsy for definitive diagnosis of renal involvement (Evidence: Moderate 1).

Evaluate immunosuppressive therapy cautiously in adults, with rituximab showing promise in severe cases (Evidence: Weak 3).

References

1 Shuai LJ, Zhang QY, Li XZ, Rong ZH, Nong GM, Wang T et al.. Guidelines for the diagnosis and management of childhood immunoglobulin A vasculitis. World journal of pediatrics : WJP 2025. link 2 Hui G, Cheng Z, Ran H, Ziwei W, Fang D. A Pooled Study of Angiotensin-Converting Enzyme Insertion/Deletion Gene Polymorphism in Relation to Risk, Pathology and Prognosis of Childhood Immunoglobulin A Vasculitis Nephritis. Biochemical genetics 2021. link 3 Maritati F, Canzian A, Fenaroli P, Vaglio A. Adult-onset IgA vasculitis (Henoch-Schönlein): Update on therapy. Presse medicale (Paris, France : 1983) 2020. link 4 Weitkamp JH, Tang YW, Haas DW, Midha NK, Crowe JE. Recurrent Achromobacter xylosoxidans bacteremia associated with persistent lymph node infection in a patient with hyper-immunoglobulin M syndrome. Clinical infectious diseases : an official publication of the Infectious Diseases Society of America 2000. link

Immunoglobulin A vasculitis