TY - CHAP M1 - Book, Section TI - Psoriatic Arthritis and Reactive Arthritis A1 - Orbai, Ana-Maria A1 - Flynn, John A. A2 - Kang, Sewon A2 - Amagai, Masayuki A2 - Bruckner, Anna L. A2 - Enk, Alexander H. A2 - Margolis, David J. A2 - McMichael, Amy J. A2 - Orringer, Jeffrey S. PY - 2019 T2 - Fitzpatrick's Dermatology, 9e AB - AT-A-GLANCEPsoriatic arthritis is a progressive inflammatory musculoskeletal disease occurring in about a third of people with psoriasis.Psoriatic arthritis is underdiagnosed.Clinical presentation is heterogeneous and variably includes the following manifestations: peripheral arthritis, spondyloarthritis (inflammatory arthritis of the spine), enthesitis (inflammation at the insertion sites of ligaments and tendons onto bone), and dactylitis (full-thickness inflammation of digits and toes).Associated extramusculoskeletal manifestations in addition to skin and nail psoriasis are inflammatory eye disease and inflammatory bowel disease.Several genetic risk factors have been identified for psoriatic arthritis.Serology for the rheumatoid factor is usually negative and inflammatory markers may be normal.Prompt recognition, pharmacologic treatment, and disease monitoring are necessary to prevent damage and improve long-term outcomes for psoriatic arthritis. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/28 UR - accessmedicine.mhmedical.com/content.aspx?aid=1161332832 ER -