Le rhumatisme psoriasique : diagnostic, critères et frontières

Abstract

Psoriatic arthritis (PsA) is a chronic inflammatory disease that shares many features with the spondyloarthritides and is nowadays considered as a subtype of this group. However, PsA has specific characteristics which led to its recognition as an individual disease and fueled the creation of several sets of classification criteria aiming to diagnose PsA. The first diagnostic approach was made by Moll and Wright and, until recently, was widely used in trials and in scientific articles. Following this rather innovative step, many researchers tried to improve the classification criterion for PsA, helped by the huge progress achieved in numerous medical fields. The latest of these attempts was the one that produced the CASPAR criterion, currently the most extensively used. However, despite these efforts to clarify PsA, some points remain hazy and may even be controversial. In fact, PsA is a heterogenous and complex disease, known to present with various clinical manifestations, and it shares common features with many other musculoskeletal conditions, including rheumatoid arthritis and erosive hand osteoarthritis. Indeed, distinguishing PsA from these diseases could be tricky and some gaps still need to be filled in order to reach a consensus on the diagnosis of PsA.