Systemic Juvenile Idiopathic Arthritis

The goal of this study is to collect clinical data and samples and to evaluate the feasibility of allogeneic hematopoietic cell transplantation (HCT) in children and young adults with refractory Systemic Juvenile Idiopathic Arthritis (sJIA), including those with sJIA-associated lung disease (sJIA-LD).

This study aims to describe the clinical features, disease patterns, and different treatment modalities used in children with systemic juvenile idiopathic arthritis (sJIA). The study will include children younger than 18 years who meet the established classification criteria for sJIA. Clinical findings, laboratory investigations, disease activity, complications, and treatments received will be assessed. Participants will be followed prospectively to evaluate their clinical course and response to different therapeutic approaches. The study will help improve understanding of sJIA in children and provide information about the outcomes associated with different treatment modalities.

This study aims to assess and characterize the treatment patterns, and long-term clinical outcomes and demographic characteristics of patients diagnosed with Familial Mediterranean fever (FMF) and Still's disease (including systemic juvenile idiopathic arthritis \[SJIA\] and adult-onset Still's disease \[AOSD\]) that received canakinumab for at least 6 months.