“…Symptoms resembling enthesitis (i.e., pain/ swelling of heel) were reported by 31% of patients, and symptoms resembling dactylitis (i.e., ''sausage'' digits) were reported by 45% of patients. Enthesitis and dactylitis, important distinguishing features of PsA in many patients, are associated with more severe disease; both can be difficult to treat and can lead to disability [5,13,31]. Approximately twice as many patients with PsA (21%) had nail involvement compared with patients with psoriasis alone (11%), and 44% of patients with PsA reported scalp involvement; however, overall these rates are lower than those previously reported [8,17,18,21,26].…”