A 37-year-old woman came with gradually progressive pain on extension of the left wrist since two months. The pain was and more over the lateral aspect of the wrist.
Normal Left side
On ultrasonography of the left wrist, the tendons of the first extensor compartment - the abductor pollicis longus and extensor pollicis brevis- are bulky and thickened for an approximate length of 2.5 cm at the wrist joint. Anechoic free fluid is seen around the affected segment.