capsule of the wrist (60-70%) near the dorsal band of the scapholunate ligament. A less common location is the radial aspect of the volar face of the wrist, close to the radial artery, and the palmar aspect of the fingers, near the A1 pulleys. Ganglia on sonography usually appear as hypoechoic or anechoic, well-delineated masses that can show internal septa and are usually located near a joint or a tendon sheath [1,2,[4][5][6][7] (Fig. 1).The sonographic appearance of ganglia depends on their size and chronicity [6]. Larger cysts are often anechoic, and old lesions are echogenic and show internal thick septa. Color Doppler sonography can show a hypervascular wall in symptomatic patients (Fig. 2), although vascularity does not always correlate with symptoms and vice versa. Smaller dorsal ganglia, also known as occult ganglia, are difficult to detect clinically and frequently cause local pain and limitation of movement [7]. Sonography shows them as 1-to 3-mm unilocular, anechoic cysts located near the dorsal band of the scapholunate ligament (Fig. 3). Sonography can assess their relation to the overlying extensor tendons and to the posterior interosseus nerve. In addition, sonography can assess the scapholunate ligament [8,9] and rule out effusions of the radiocarpal joint.Volar wrist ganglia usually are found near the flexor carpi radialis tendon and often displace the radial artery and its palmar branch. Color Doppler sonography easily assesses the internal flow of the artery and can differentiate ganglia from arterial pseudoaneurysms. The differential diagnosis of volar ganglia also includes tenosynovitis of the