Figure 19. Cubital tunnel syndrome. Photograph (right) shows the area scanned. Transverse US scan of the right elbow (RT) shows swelling of the ulnar nerve (arrowheads) at the medial epicondyle level, compared with the normal left arm (LT) (arrows). This 55-year-old woman complained of numbness of the fourth and fifth fingers of the right hand. Cubital tunnel syndrome was diagnosed by means of nerve conduction velocities and electromyography.