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14 mo, Male, Belgian
4 views of the right tarsus
Presented for evaluation of right tarsal swelling. Not reported to be lame.
See images below. Click to enlarge.
Radiographic Diagnosis (Synthesis):
Candidates had little difficulty in identifying the typical osteochondrosis lesion of the distal tibia and lateral trochlear ridge distal lesion. However there was a significant “satisfaction of search” error in that the majority did not identify the subchondral cystic lesion. Many also mis-identified anatomy, particularly in the DLPMO view where they called the normal contour of the medial distal surface of the talus abnormal (basically the contour effects created by the distal tuberosity of the talus – located on the medial surface of the bone) and equated this with the defect they expected to be present as a consequence of the lateral trochlear distal lesion. In essence the impression was that there was significant lack of recognition of the bone contours in the oblique views. Candidates also did not recommend radiographs of the opposite tarsus, even though they recommended surgical/arthroscopic removal of the identified osteochondral fragments.
©2015 American College of Veterinary Radiology