Psoriatic arthritis (PsA) is characterized by chronic inflammation of peripheral joints and axial skeleton, associated with a strong genetic background. Clinics include enthesitis or dactylitis and extra-articular involvement as uveitis or inflammatory bowel disease, while treatment options range from nonsteroidal anti-inflammatory drugs (NSAIDs) to biologics, targeting TNF alpha or Th17. No serum autoantibody is associated with PsA, while other biomarkers have been proposed for early diagnosis or to predict treatment response.
The management of psoriatic arthritis (PsA) and psoriasis has undergone major advancements over the last decade. This has been made possible, in part, due to the introduction of new therapies for their management, as well as global collaboration in the development of outcome measures and "treat- to- target" paradigms.
Psoriatic arthritis (PsA) is a chronic immune-mediated inflammatory disease that affects peripheral joints, entheses and axial sites in addition to both skin and nails. There is considerable evidence to support the assertion that PsA is actually a multisystem disease. Contrary to earlier beliefs, PsA is not only common but also a potentially deforming and disabling disease. In addition to the characteristic extra-articular features, such as uveitis and inflammatory bowel disease, patients with PsA may also suffer from co-existing diseases, referred to as comorbidities.
The current European League Against Rheumatism (EULAR) recommendations on the use of imaging suggest the use of ultrasound (US) in chronic arthritis to increase the diagnostic accuracy and improvement of its management as compared to clinical examination alone. Although US findings are not firmly established in daily clinical practice, it demonstrated several positive aspects such as good sensitivity and specificity, acceptable reliability, and adequate sensitivity to change, especially in the peripheral PsA. Additionally, recent works introduced the role of US in the assessment of skin and nails opening interesting area of research.