One year in review 2018: psoriatic arthritis.

Spondyloarthritis (SpA) is an inflammatory condition characterised by a broad spectrum of clinical manifestations, laboratory abnormalities and imaging features that genetically tend to be associated with the major histocompatibility complex class 1 antigen, HLA-B27, and in which both peripheral and axial joints might be affected. In addition to arthritis, the typical musculoskeletal manifestations are enthesitis and dactylitis. Extraarticular manifestations such as acute anterior uveitis (AAU), psoriasis (PsO) and inflammatory bowel disease (IBD) are also typical of SpA. In this article we have reviewed the literature of the past year on one of the most important variants of SpA, i.e. psoriatic arthritis (PsA) (Medline search of articles published from 1st January 2018 to 31st January 2019).