systemic onset JIA
Also written as: soJIA — systemic onset juvenile idiopathic arthritis
A severe subtype of juvenile arthritis characterized by high fever, rash, and systemic inflammation preceding joint involvement.
Full Definition
Systemic onset juvenile idiopathic arthritis (soJIA) represents the most severe subtype of childhood arthritis, distinguished by prominent systemic features including quotidian fever spikes, characteristic salmon-colored rash, hepatosplenomegaly, lymphadenopathy, and serositis. Joint symptoms may be minimal initially or absent entirely. This subtype carries the highest risk of serious complications including macrophage activation syndrome and requires aggressive immunosuppressive therapy. The condition can evolve into a chronic arthritis pattern similar to adult Still's disease.
Usage
Usage note: Distinguish clearly from other JIA subtypes in clinical documentation due to different treatment protocols.
In Context
- "The child presented with systemic onset JIA featuring daily fever spikes and a characteristic evanescent rash." — Case presentation
- "Tocilizumab has shown efficacy in treating refractory systemic onset JIA with persistent systemic features." — Treatment review