title: Axial disease in psoriatic arthritis.
abstract: The definition of axial disease in psoriatic arthritis has varied from isolated unilateral grade 2 sacroiliitis to criteria similar to those used for ankylosing spondylitis. Depending on the definition used, the prevalence of axial disease varies from 25% to 70% of patients with psoriatic arthritis. This article reviews the prevalence, clinical and radiologic features, pathogenesis, prognosis, and treatment of psoriatic spondylitis.
authors.affiliation: Centre for Prognosis Studies in Rheumatic Diseases, Toronto Western Hospital, 399 Bathurst Street, 1E-410B, Toronto, Ontario, M5T 2S8, Canada. dafna.gladman@utoronto.ca
authors.forename: Dafna D
authors.initials: DD
authors.lastname: Gladman
mesh_terms: D015535:Arthritis, Psoriatic / Q000175:diagnosis / Q000453:epidemiology* / Q000503:physiopathology; D001175:Arthrography; D015897:Comorbidity; D006801:Humans; D015995:Prevalence; D013131:Spine / Q000000981:diagnostic imaging; D013166:Spondylitis / Q000175:diagnosis / Q000453:epidemiology* / Q000503:physiopathology