Table 2 Typical manifestations of the articular and periarticular inflammation of JIA in early and late disease. The order of presentation is not absolute; some of the features may not be present at all or the features may overlap

Periarticular soft tissue change

Early

Late

 Synovitis

 Tendinitis

 Bursitis

Periarticular bony change

 Bone oedema

 Periostitis

 Growth disturbances

 Osteoporosis

Destructive change of bone and cartillage

 Erosive change of bone

 Joint space narrowing, bone fusion, malalignment