Quantification of radiological damage in inflammatory arthritis: rheumatoid arthritis, psoriatic arthritis and ankylosing spondylitis.

Quantification of radiological damage in inflammatory arthritis is important. It has proven its value in clinical trials, but its use in clinical practice is becoming more important as well. Scoring methods for rheumatoid arthritis, psoriatic arthritis and ankylosing spondylitis are available. These differ in the joints and features assessed. This results in differences in the scoring range, but also in the method of performance. The various methods for the three diseases are detailed in this chapter. Most information is available for rheumatoid and for this disease the relationship between radiological damage and long-term outcome is summarised.