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 research study is to collect information over time in juvenile SpA and back pain patients.

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).