[New treatments in pediatric rheumatology: effects, limits, and future developments].

Juvenile idiopathic arthritis (JIA) is a heterogeneous group of diseases. International networks have enabled therapeutic trials of medications targeting tumor necrosis factor (TNF)-alpha, interleukin (IL)-1, IL-6, or T-cell costimulation (abatacept). JIA-associated chronic uveitis may require the use of biotherapies that remain experimental in JIA, such as monoclonal antibodies to TNF-alpha. Systemic-onset JIA (also called childhood-onset Still's disease) raises specific treatment challenges and may require treatment with IL-1 or IL-6 antagonists. Patients with JIA should be managed in specialized centers that have coordinated chains of care for the entire pediatric period and into adulthood. In addition, the use of recently introduced treatments in pediatric patients requires close monitoring for long-term side effects.