Power Doppler Ultrasound Evaluation of Peripheral Joint, Entheses, Tendon, and Bursa Abnormalities in Psoriatic Patients: A Clinical Study

Two-dimensional and PD ultrasonic appearances of synovitis, enthesitis, tenosynovitis, and bursitis. A. Synovitis in a left metatarsophalangeal joint in a non-PsA psoriatic patient. Arrows indicate the thickened synovium. B. Synovitis in a right wrist in a PsA patient with PD grade 3. Arrows indicate the thickened synovium and its rich blood flow. C. Enthesitis in a left femoral quadriceps tendon in a non-PsA psoriatic patient. Arrows indicate the hypoechogenicity of the thickened tendon at the bone attachments, which contain hyperechogenicity foci. D. Enthesitis in a right patella ligament in a PsA patient with PD grade 1. Arrows indicate the hypoechogenicity of the thickened ligament at the distal bone attachments, which exhibit rich Doppler signal. E. Tenosynovitis in an extensor tendon of the left hand in a patient with PsA. Arrows indicate the hypoechoic thickened tissue within the tendon sheath. F. Tenosynovitis in a flexor tendon of the right hand in a PsA patient with PD grade 2. Arrows indicate the hypoecho at peritendon, which exhibits a rich Doppler signal. PD: power Doppler; PsA: psoriatic arthritis.