Researchers seeking to uncover critically sought-after information around the significance of sesamoiditis and stifle lesions in the legs of young Thoroughbreds will be following a group of racehorses until the end of their three-year-old seasons. The crucial earlier phases of the study have already been completed. The x-ray/ultrasound-based study is exploring two of the most often discussed controversial issues affecting the Thoroughbred: radiographic findings in the proximal sesamoid bones of the fetlock with associated suspensory branch changes; and radiographic findings in the medial femoral condyle of the stifle. The work is being led by Colorado State University’s Orthopaedic Research Center veterinarians, Drs Wayne McIlwraith, Frances Peat, and Chris Kawcak; and Dr Jeff Berk, from Lexington.