Granulomatosis with Polyangiitis in Adolescence: Two Distinct Presentations

Area of Science:

• Pediatric Rheumatology
• Vasculitis Research
• Autoimmune Diseases

Background:

• Granulomatosis with polyangiitis (GPA) is a rare systemic vasculitis affecting children.
• GPA presents with diverse clinical manifestations and organ involvement in pediatric patients.
• Early diagnosis and tailored treatment are crucial for managing pediatric GPA.

Observation:

• Two pediatric GPA cases with distinct presentations are detailed: a 17-year-old male with pulmonary and thrombotic complications, and a 12-year-old female with limb inflammation and alveolar hemorrhage.
• Both patients tested positive for C-ANCA and anti-PR3 antibodies.
• Treatment involved corticosteroids, immunoglobulin, plasmapheresis, and rituximab, with rituximab demonstrating efficacy in remission induction and maintenance.

Findings:

• GPA exhibits variable clinical phenotypes in children, necessitating individualized management strategies.
• Rituximab is an effective therapeutic option for both induction and maintenance of remission in pediatric GPA.
• Prompt and aggressive treatment, including rituximab, led to significant clinical improvement and resolution of findings in both reported cases.

Implications:

• These cases underscore the importance of considering GPA in children presenting with unexplained systemic or organ-specific inflammation.
• Rituximab offers a promising therapeutic avenue for pediatric GPA, potentially improving long-term outcomes.
• Further research into optimal rituximab dosing and duration for pediatric GPA is warranted.