Fig. 2

Sonographic findings of tenosynovitis in JIA. a 13 years 5 months old female referred for injection of the 4th flexor tendon sheath of the right hand. Ultrasound showed no fluid or signs of inflammation around the tendon in the transverse view. b 9 years 11 months old female referred for injection of the tibialis posterior tendon sheath. Ultrasound showed accumulation of peritendinous fluid and thickening of the synovial sheath in the transverse view. c 8 years 1 month old female referred for injection of the tibialis posterior tendon sheath. Ultrasound showed accumulation of echogenic peritendinous fluid in the longitudinal view. d 15 years 8 months old male referred for injection of the tibialis posterior tendon sheath. Ultrasound showed peritendinous fluid, synovial thickening with increased color-Doppler signal on the synovium covering the tendon (white arrow) and lining the cavity (green arrow). T = Tendon, S = Synovial sheath thickening, F = Peritendinous fluid