The purpose of this registry is to study the long-term effects and safety of Abatacept(Orencia) as used for the treatment of Juvenile Idiopathic Arthritis(JIA). JIA patients that are currently taking Abatacept may be eligible to participate in this study.

The purpose of this study is to find out how well surveys can measure disease activity in kids with lower back arthritis. The study will last for either 3 or 6 months and take 2 or 3 visits.

This is an observational registry of children and young adults with pediatric-onset rheumatic conditions such as juvenile idiopathic arthritis (JIA) and Systemic Lupus Erythematosus (SLE) and SLE-like conditions.

The purpose of this study is to see if a new investigational drug (Upadacitinib) is safe and well tolerated and also to determine the appropriate dose for subjects with polyarticular course juvenile arthritis (pcJIA).