Prevalence and distribution of peripheral musculoskeletal manifestations in spondyloarthritis including psoriatic arthritis: results of the worldwide, cross-sectional ASAS-PerSpA study.
Clementina López MedinaAnna MoltóJoachim SieperTuncay DuruözUta KiltzBassel ElzorkanyNajia Hajjaj-HassouniRuben Burgos-VargasJosé Maldonado-CoccoNelly ZiadéMeghna GavaliVictoria Navarro-CompanShue-Fen LuoSara MontiKim Tae-JongMitsumasa KishimotoF M Pimentel-SantosJieruo GuRuxandra SchiotisFloris A van GaalenPál GeherMarina MagreySebastián Eduardo Ibáñez VodnizzaWilson Bautista MolanoWalter MaksymowychPedro M MachadoRobert LandewéDésirée Mfm van der HeijdeMaxime DougadosPublished in: RMD open (2021)
These results suggest that all peripheral features can be found in all subtypes of SpA, and that differences are quantitative rather than qualitative. In a high proportion of patients, axial and peripheral manifestations coincided. These findings reconfirm SpA clinical subtypes are descendants of the same underlying disease, called SpA.