<qa>  What is the name of the PDUS evaluation?A total of 100 patients with vulgaris psoriasis and 100 age-matched controls with other skin diseases, all without musculoskeletal diseases, will be recruited. They will undergo dermatological assessment and a blinded PDUS evaluation. Clinical assessment included demographics, severity of psoriasis, musculoskeletal clinical examination and sport activities. PDUS evaluation consisted of the detection of grey scale GS synovitis and synovial PD signal in joints of extremities, GS enthesopathy and entheseal PD signal in entheses of lower limbs. 