Figure 2 .

A 30 year old patient with psoriatic arthritis (patient number 17) presented at baseline clinical examination with a severe pain of the distal interphalangeal joint of his left second finger (VAS score 8; tenderness score 3). At follow up clinical examination the patient had complete remission of pain (VAS score 0; tenderness score 0). (A) Baseline ultrasound examination on longitudinal dorsal scan detected evident signs of active synovitis: joint cavity widening (GSS score 2) and intra-articular power Doppler signals (PDS score 4). A sonographic guided injection with 10 mg of triamcinolone acetonide was performed. (B) Two weeks after the injection an ultrasound examination performed at the same plane of scanning showed the disappearance of both GSS (score 1) and PDS (score 1) findings. dp, distal phalanx; mp, middle phalanx.