An Observational Registry of Abatacept in Patients With Juvenile Idiopathic Arthritis

For more information regarding BMS clinical trial participation, please visit www.BMSStudyConnect.com Inclusion Criteria * Diagnosis of JIA (any subtype) * Age \< 18 years at the time of enrollment unless currently or previously enrolled in an abatacept clinical trial and received abatacept * Receiving Abatacept at the time of enrollment as per treating physician's decision or received abatacept in a clinical trial * Parent or legally acceptable representative willing to participate in the study and sign the informed consent Exclusion Criteria * Pregnant or nursing female at the time of enrollment * Prior malignancies if the patient has not been malignancy free for at least 5 years. * Any serious acute or chronic medical condition other than JIA, including chronic infection, which would compromise the patient's ability to participate in the study * Known poor compliance with clinic visits (based on physician judgment).