Fig. 4

Ultrasonographic image of the lateral aspect of the elbow of a 3 year old thoroughbred gelding. Longitudinal and transverse images of the lateral epicondyle of the right elbow. There is an irregular bone surface and remodelling of the lateral epicondyle of the right humerus at the site of the origin of the ulnaris lateralis tendon. The fibre pattern of the ulnaris lateralis tendon was disrupted on the longitudinal view, with a discrete hypo-echoic region at the site of origin onto the lateral epicondyle