Clinical assessment in psoriatic arthritis.

Due to the heterogeneous clinical picture, with a possible combination in any individual patient of axial disease, peripheral arthritis, enthesitis and dactylitis, psoriatic arthritis (PsA) is difficult to assess. Validated assessment tools for PsA are lacking. Recently, international study groups have a special interest in developing and validating standardized tools to assess PsA. We will review the existing assessment modalities of PsA focusing on axial disease, peripheral arthritis, enthesitis and dactylitis. Measures of function and disability recommended for PsA will be also reviewed.