Transverse ultrasonograpy of the posterior tibial tendon in a patient with rheumatoid arthritis

Left panel shows a grey-scale transverse sonogram of the posterior tibial tendon (T) of a patient with rheumatoid arthritis as it passes near the medial malleolus (M) and talus (Ta). The tendon sheath is distended with fluid (arrowheads). The right panel shows a power Doppler sonogram of the same patient. Both pictures show an extensive inflammation of both the tendon and the tendon sheath.