NCIt related terms : Juvenile Spondyloarthropathy; JSpA;
NCIt definition : A group of chronic, inflammatory childhood diseases characterized by arthritis and
enthesitis. This disorder can affect the axial skeleton in late childhood or young
adulthood.;
Alternative definition : NICHD: Onset of spondyloarthritis before 18 years of age, and less commonly associated
with axial disease. Encompasses the juvenile idiopathic arthritis categories of enthesitis-related
arthritis and psoriatic arthritis, and includes many cases of undifferentiated arthritis.;