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Updated: Mar 30, 2026

Author Spotlight: Self-Assessment Protocol for Predicting Psoriatic Arthritis in Psoriasis Patients
Published on: March 1, 2024
Relationship of Psoriatic Arthritis to Other Spondyloarthritides
Ignazio Olivieri1, Salvatore D'Angelo2, Michele Gilio2
1From the Rheumatology Department of Lucania, San Carlo Hospital of Potenza and Madonna delle Grazie Hospital of Matera, Potenza and Matera; and the Academic Rheumatology Unit, Department of Medicine and Health Sciences, University of Molise, Campobasso, Italy.I. Olivieri, MD, Consultant, Director, Rheumatology Department of Lucania, San Carlo Hospital of Potenza and Madonna delle Grazie Hospital of Matera; S. D'Angelo, MD, Researcher, Rheumatology Department of Lucania, San Carlo Hospital of Potenza and Madonna delle Grazie Hospital of Matera; M. Gilio, MD, Researcher, Rheumatology Department of Lucania, San Carlo Hospital of Potenza and Madonna delle Grazie Hospital of Matera; C. Palazzi, MD, Senior Investigator, Rheumatology Department of Lucania, San Carlo Hospital of Potenza and Madonna delle Grazie Hospital of Matera; E. Lubrano, MD, PhD, Senior Lecturer, Academic Rheumatology Unit, Department of Medicine and Health Sciences, University of Molise; A. Padula, MD, Senior Registrar, Rheumatology Department of Lucania, San Carlo Hospital of Potenza and Madonna delle Grazie Hospital of Matera. ignazioolivieri@tiscalinet.it i.olivieri@ospedalesancarlo.it.
Abstract:
In the early 1970s, Moll and co-workers formulated the unified concept of spondyloarthritides, a group of conditions sharing similar clinical features. Subsequently, criteria for their classification have been proposed by Amor and coworkers, the European Spondylarthropathy Study Group, and the Assessment in SpondyloArthritis international Society. Opinion, however, is divided between those who believe that the different entities of the complex represent the variable expression of the same disease ("lumpers") and those who think that these should be considered separately but under the same umbrella ("splitters"). Several sets of criteria have been proposed for psoriatic arthritis (PsA), the most recent being the ClASsification for Psoriatic Arthritis (CASPAR) criteria. According to some authors, there are persuasive arguments to support the view of PsA as a distinct entity.
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