Determining Predictors of Safe Discontinuation of Anti-TNF Treatment in JIA

Polyarticular juvenile idiopathic arthritis (Poly JIA) is a form of juvenile arthritis, which is a chronic disease affecting approximately 250,000 people younger than 16 years of age. Poly JIA can be treated with anti-tumor necrosis factor (anti-TNF), a type of medication that is often effective but also has some toxic side effects and is expensive. Among those with poly JIA who are effectively treated with anti-TNF, some can remain healthy off the medication, but some begin to feel the effects of their disease again once the medication is stopped. This study will attempt to find whether certain tests or signs can predict which people with poly JIA can safely stop their anti-TNF medications.