Comparison of radiography and ultrasonography to detect osteochondrosis lesions in the tarsocrural joint: a prospective study.
BACKGROUND
Lesions located on the medial malleolus of the tarsocrural joint can be difficult to image radiographically. Ultrasonography allows evaluation of articular cartilage and subchondral bone.


OBJECTIVE
To compare dorso30 degrees lateral-plantaromedial-oblique (DL-PIMO) and dorso45 degrees views to detect lesions on the medial malleolus, to validate the use of ultrasonography to show lesions in the tarsocrural joint and to compare its sensitivity to radiography.


METHODS
Tarsocrural joints (n=111) with osteochondrosis were evaluated ultrasonographically and radiographically prior to arthroscopic lesion debridement. A complete radiographic examination was made and the best view to detect each lesion recorded. Longitudinal and transverse ultrasonography of the dorsal aspect of the joint was performed and the best scan plane to image each lesion recorded.


RESULTS
There were 94 joints with lesions on the distal intermediate ridge of tibia, 24 with lesions on the medial malleolus, and 4 with lesions on the lateral trochlear ridge. The sensitivity of radiography to detect lesions on the medial malleolus and distal intermediate ridge of tibia was 71 and 96%, respectively. Eighty-two percent of lesions on the medial malleolus were better imaged on dorso30 degrees view. The sensitivity of ultrasonography to detect lesions on the medial malleolus and distal intermediate ridge of tibia was 83 and 98%, respectively. Ultrasonography was significantly more sensitive than radiography to detect lesions on the medial malleolus and distal intermediate ridge of tibia.


CONCLUSIONS
Dorso30 degrees lateral-plantaromedial-oblique view was the best to image lesions on the medial malleolus. Ultrasonography was a valuable diagnostic tool to diagnose lesions in the tarsocrural joint and was more sensitive than radiography for lesions located on the medial malleolus and distal intermediate ridge of tibia.


CONCLUSIONS
Radiographic examination should include a dorso30 degrees view for detection of lesions on the medial malleolus and ultrasonography should be considered to diagnose osteochondrosis in the tarsocrural joints.
Relave
F
F
Départment de Sciences Cliniques, Faculté de Médecine Vétérinaire, Université de Montréal, Québec, Canada.
Meulyzer
M
M
Alexander
K
K
Beauchamp
G
G
Marcoux
M
M
D000818:Animals; D002358:Cartilage, Articular / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D006734:Horse Diseases / Q000000981:diagnostic imaging*; D006736:Horses; D055034:Osteochondrosis / Q000000981:diagnostic imaging / Q000662:veterinary*; D011446:Prospective Studies; D011859:Radiography; D012680:Sensitivity and Specificity; D013640:Tarsal Joints / Q000000981:diagnostic imaging*; D013643:Tarsus, Animal / Q000000981:diagnostic imaging; D014463:Ultrasonography