title: The place of psoriatic arthritis in the spondarthritides.
abstract: The place of psoriatic arthritis in the spondarthritides has been examined in terms of past, present and future aspects. It is concluded that: 1. PsA is a definite entity and separate from rheumatoid arthritis. 2. The spondarthritis concept is universally accepted, although still in an evolving stage. 3. A more definitive picture of the spondarthritides and of PsA itself could arise from a number of new approaches, some entirely novel, some extensions of work already in progress. Avenues of future research that are likely to be fruitful include those involving: more refined clinical studies; further applications of molecular mapping; and, common to both, conceptual advances using mathematical models to provide a more 'three-dimensional' picture.
authors.affiliation: Sheffield Centre for Rheumatic Diseases, Nether Edge Hospital, UK.
authors.forename: J M
authors.initials: JM
authors.lastname: Moll
mesh_terms: D001168:Arthritis / Q000150:complications; D015535:Arthritis, Psoriatic / Q000145:classification / Q000150:complications* / Q000175:diagnosis / Q000453:epidemiology; D003937:Diagnosis, Differential; D006801:Humans; D008962:Models, Theoretical; D013122:Spinal Diseases / Q000150:complications