Fig. 6.

Tenosynovitis of the tibias posterior, flexor hallucis longus, and flexor digitorum longus in patient with JIA. A. Gray-scale US in axial view at the level of the tibiotalar joint presenting with thickened tendon sheaths (arrows); B. vascularization is detected in the microflow SMI mode (right image) with only subtle hyperemia seen on power Doppler (left image); C. US of the peroneus longus tendon of the same patient in longitudinal view showing markedly thickened synovium within the tendon sheath with no hyperemia on power Doppler (left image) and detected vascularization in the microflow mode on the same level (right image)