Impact of Hyperuricemia on Psoriatic Arthritis

Inclusion criteria: * Major subject (≥18 years old) * Subject with a history of psoriatic arthritis objectified according to the CIM 10-1 coding for patients followed in hospitalization at the HUS and HCC * Subject presenting psoriatic arthritis objectified during a consultation by an HCC rheumatologist * Among these two populations, all subjects for whom at least one serum uric acid assay was available in the medical file * Subject having not expressed, after being informed, opposition to the reuse of their data for research purposes Exclusion criteria: * Subject who expressed their opposition to participating in the study * Subject who met the inclusion criteria but whose analysis of the medical file (anamnestic, clinical, biological and radiological data) led to a diagnostic reversal and therefore did not present with psoriatic arthritis * Subject under guardianship or curatorship * Subject under safeguard of justice