Ankle involvement in psoriatic arthritis

Background: The aim of our study was to determine the prevalence of ankle involvement in psoriatic arthritis (PsA) and to investigate its clinical and radiological aspects. Methods: Cross-sectional monocentric study. All participants with RPso underwent a complete clinical examination standard radiographs of both ankles and osteoarticular ultrasonography. Results: We included 40 patients (mean age: 49.9 years sex ratio M/F: 1.2). The clinico-radiological form was pure peripheral (52.5%) axial and peripheral (42.5%) or pure axial (5%). Talocrural involvement was present in 50% and revealed the disease in 25% of cases. Standard radiographs were normal in 70% of cases and abnormal in 30%. Ultrasonographic abnormalities of the ankle were observed in 42.5% of cases and this involvement was infra-radiological in 47% of cases. A significant correlation was demonstrated between talocrural involvement and HAQ functional score (p=0.04). Conclusion: Ankle involvement is frequent and constitutes a major source of functional disability in RPso.