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Comparison between diagnostic imaging techniques of the elbow in medial coronoid disease
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Which technique can be recommended most in Labrador Retrievers with medial coronoid disease: radiograaphy, computed tomography or arthorscopy? A relevant question in daily practice! This study describes the radiographic, computed tomographic (CT), and arthroscopic findings in different age groups of Labrador Retrievers diagnosed with medial coronoid disease (MCD), and compares the ulnar subtrochlear sclerosis (STS) observed on radiographs with the ratio between the mean attenuation of the ulnar subtrochlear bone and the mean attenuation of the cortical bone measured on CT.
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Dogs (n = 31; 31 elbow joints) and 6 healthy Labrador Retrievers (6 elbow joints) were included in the study.
Radiographic, CT, and intraoperative arthroscopic images (2008–2012) were evaluated.
Statistical analysis was performed for the descriptive study to evaluate the difference in findings between age groups and to investigate the correlation between radiographic and CT evaluated ulnar STS.
Ulnar STS (87.6%) was the most common radiographic findings in dogs ≤12 months and blurring of the cranial edge of the medial coronoid process (MCP; 66.7%) was the most common radiographic findings in dogs >12 months.
MCP fragmentation was the most common CT finding in both age groups (93.8% [≤12 months]; 66.7% [>12 months]).
A displaced fragment (68.8%) was the most common arthroscopic finding in dogs ≤12 months whereas osteochondromalacia (53.3%) was the most common finding in dogs >12 months.
Sensitivity of radiography in detecting MCD was 93.8% (≤12 months) and 73.3% (>12 months) and for CT was 93.8% (≤12 months) and 66.7% (>12 months).
Radiographic evaluated ulnar STS was strongly correlated with CT evaluated ulnar STS.
Wide ranges of radiographic, CT, and arthroscopic findings in Labrador Retrievers diagnosed with medial coronoid disease were identified.
Source: Lau, S. F., Theyse, L. F.H., Voorhout, G. and Hazewinkel, H. A.W. (2015), Radiographic, Computed Tomographic, and Arthroscopic Findings in Labrador Retrievers With Medial Coronoid Disease. Veterinary Surgery, 44: 511–520. doi: 10.1111/j.1532-950X.2014.12291.x
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