Structural progression in axial spondyloarthritis.

Functional disability in axial spondyloarthritis is related to the structural progression caused by the disease, thus largely contributing to its global burden and still representing a major challenge in management. Diagnosis at an early inflammatory stage of the disease is the hallmark for a better disease control and management. The natural history of axial spondyloarthritis is now better understood with imaging studies and long-term follow-up data, with some predictive factors for structural progression being identified. Non-steroidal anti-inflammatory drugs are still considered as the first line treatment for axial spondyloarthritis, however, their impact on structural progression is conflicting. Recent data on biologic disease-modifying anti-rheumatic drugs, such as tumor necrosis factor inhibitors have shown significant retardation of radiographic damage after several years of treatment, while first data with interleukin-17 inhibitors were also positive. Novel emerging drugs are being evaluated with promising results on halting disease progression. This review summarizes the predictors of radiographic progression in patients with axial spondyloarthritis as well as the current evidence on the effect of available treatments on structural progression.