Fig. 4
A 10 years old girl with JIA presented with mild swelling of the left ankle, without tenderness/pain on motion or limitation on motion. MSUS showed no signs of synovitis at the tibiotalar joint (a), and allowed detection of a hypo-anechoic halo around the medial tendons (b) and pathologic vascularization on power Doppler along both the posterior tibialis tendon (c) and the common flexor digiti tendon (d), indicating flourishing tenosynovitis. PTT: posterior tibialis tendon; CDT: common flexor digitorum tendon; A: posterior tibialis artery; V: posterior tibialis vein