Left: This is a digital ultrasound image of the flexor tendons of the forelimb. There is a dark, ‘core lesion’ in the superficial digital flexor tendon which is the uppermost, half-moon shaped structure on the image on the left. The left image is a transverse image of the tendons, the image on the right is a longitudinal image. This injury is common in race horses, but occurs in all breeds when the horse hyperextends the fetlock, and frequently occurs when horses are fatigued. Right: This is a normal ultrasound image of the flexor tendons of the hind limb.
