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Radiographic, computed tomographic and arthroscopic findings in 23 dogs with osteochondrosis of the tarsocrural joint
  1. I. Gielen, DVM, MSc1,
  2. H. van Bree, DVM, PhD, DiplECVS, ECVDI1,
  3. B. Van Ryssen, DVM, PhD1,
  4. T. De Clercq, DVM1 and
  5. H. De Rooster, DVM, MSc1
  1. 1 Department of Medical Imaging, Faculty of Veterinary Medicine, Ghent State University, Salisburylaan 133, B-9820 Merelbeke, Belgium

Abstract

Twenty-three dogs with osteochondrosis of the tarsocrural joint were evaluated by radiography, computed tomography (Cr) and arthroscopy. The radiographic examination included an extended and flexed mediolateral, a plantarodorsal, a flexed dorsoplantar skyline view, and a plantaromedial-dorsolateral and a plantarolateral-dorsomedial view (two oblique views). The cT examination was carried out in ventral recumbency and 1 mm slices were taken with a bone window setting; 31 lesions were identified in the 46 joints examined. The arthroscopic exploration used either a plantar or a dorsal puncture, depending on the site of the lesion. In six cases the lateral, and in 17 cases the medial trochlear ridge was involved. Although the survey radiographs were sufficient to make a diagnosis, the cT examination helped to determine the exact site, and the number and size of the fragments of bone. A four-stage classification system comparable to the one used in man was established. Arthroscopy provided information about synovial inflammation and damage to the joint cartilage, and made it possible to remove fragments of bone from one-third of the cases.

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