Radiological assessment of knees in juvenile chronic arthritis (juvenile rheumatoid arthritis).

Radiological changes in the knees were assessed in those patients with juvenile chronic arthritis who still had evidence of knee involvement 5 years after onset of the disease. The patients were grouped according to age and mode of onset. Osteoporosis, modelling abnormalities, growth arrest lines and joint narrowing were found, but erosive change was less common. Tables are given correlating age of onset of disease with radiologic changes.