Fig. 1From: Hip Pain Associated with Acetabular Dysplasia in Patients with Suspected Axial Spondyloarthritis: DESIR Cohort DataParameters used to define acetabular dysplasia. A Tönnis angle, (B) acetabular angle (AA), (C) lateral centre edge angle (LCEA), (D) femoral head extrusion index (FHEI). The orange line passes through the centre of the femoral headsBack to article page