Diagnostic imaging of psoriatic arthritis. Part I: etiopathogenesis, classifications and radiographic features
Iwona Sudoł-Szopińska1,2, Genowefa Matuszewska1, Brygida Kwiatkowska3, Grzegorz Pracoń1
1 Radiology Department, National Institute of Geriatrics, Rheumatology and Rehabilitation, Warsaw, Poland
2 Department of Diagnostic Imaging, Second Faculty, Warsaw Medical University, Warsaw, Poland
3 Early Arthritis Clinic, National Institute of Geriatrics, Rheumatology and Rehabilitation, Warsaw, Poland
Correspondence: Prof. Iwona Sudoł-Szopińska, MD, PhD, Department of Radiology, National Institute of Geriatrics, Rheumatology and Rehabilitation, Spartańska 1, 02-637 Warsaw, Poland, e-mail: firstname.lastname@example.org, tel./fax: +48 22 844 42 41
Psoriatic arthritis is one of the spondyloarthritis. It is a disease of clinical heterogenicity, which may affect peripheral joints, as well as axial spine, with presence of inflammatory lesions in soft tissue, in a form of dactylitis and enthesopathy. Plain radiography remains the basic imaging modality for PsA diagnosis, although early inflammatory changes affecting soft tissue and bone marrow cannot be detected with its use, or the image is indistinctive. Typical radiographic features of PsA occur in an advanced disease, mainly within the synovial joints, but also in fibrocartilaginous joints, such as sacroiliac joints, and additionally in entheses of tendons and ligaments. Moll and Wright classified PsA into 5 subtypes: asymmetric oligoarthritis, symmetric polyarthritis, arthritis mutilans, distal interphalangeal arthritis of the hands and feet and spinal column involvement. In this part of the paper we discuss radiographic features of the disease. The next one will address magnetic resonance imaging and ultrasonography.