RT Book, Section A1 Manno, Rebecca L. A1 Yazdany, Jinoos A1 Tarrant, Teresa K. A1 Kwan, Mildred A2 Papadakis, Maxine A. A2 McPhee, Stephen J. A2 Rabow, Michael W. A2 McQuaid, Kenneth R. SR Print(0) ID 1193125943 T1 Psoriatic Arthritis T2 Current Medical Diagnosis & Treatment 2023 YR 2023 FD 2023 PB McGraw-Hill Education PP New York, NY SN 9781264687343 LK accessmedicine.mhmedical.com/content.aspx?aid=1193125943 RD 2024/03/28 AB ESSENTIALS OF DIAGNOSISPsoriasis precedes arthritis in 80% of cases.Arthritis: usually asymmetric, with “sausage” appearance of fingers and toes (dactylitis); polyarthritis that may resemble rheumatoid arthritis.Sacroiliac joint involvement common.Radiographic findings: osteolysis; pencil-in-cup deformity; relative lack of osteoporosis; bony ankylosis; asymmetric sacroiliitis and atypical syndesmophytes.