Snapshot A 32-year-old man presents to his rheumatologist for evaluation of new-onset joint pain. He reports feeling stiffness in his lower back in the morning and in the most distal joints in his left hand. He has a past medical history of psoriasis. On physical exam, he has papules and plaques along his hairline and scalp with overlying silver scales. His left middle finger has dactylitis and the distal interphalangeal joint is swollen. Laboratory evaluation shows that he is seronegative for rheumatoid factor. He is started on apremilast. Introduction Clinical definition login to view 1 more bullet Epidemiology login to view 8 more bullets Etiology login to view 1 more bullet Pathogenesis login to view 2 more bullets Associated conditions login to view 2 more bullets Presentation Symptoms login to view 5 more bullets Physical exam login to view 9 more bullets Imaging Radiographs login to view 8 more bullets Studies Labs login to view 2 more bullets Differential Ankylosing spondylitis Rheumatoid arthritis login to view 1 more bullet Treatment Conservative login to view 4 more bullets Medical login to view 16 more bullets Complications Cardiovascular disease