Number of breeds.

ObjectivesThe purpose of this study was to compare the radiographic and computed tomographic (CT) findings of dogs with diagnosed bilateral medial coronoid disease, which showed clinically only unilateral lameness of the forelimbs.Materials and methodsMedical records, including radiographs and CT images of dogs with diagnosed bilateral MCD showing only a unilateral forelimb lameness clinically were reviewed retrospectively. Depending on the gait of each dog we established two groups to investigate their radiographs and CT data comparatively. Group I: affected non-lame limb. Group II: affected lame limb. Several evaluation systems were used to assess which factors are important for clinical decision making and a patient tailored therapeutic plan.ResultsData from 84 affected elbow joints (42 dogs) diagnosed with MCD by computed tomography were included. Both the radiological and the CT analysis showed that there are significant differences between Groups I and II. Group I had a lower modified International Elbow Working Group Score (IEWG), the values of the Trochlear notch sclerosis were only slightly deviated, and this group showed less often a dislocation of the fragment compared to group II. Furthermore, the size of the fragment (both the median and the mean value) of the forelimbs from group II was almost twice as big as the one from group I. The following sizes of the fragments were calculated (group I versus (vs.) group II)—median: 0.09 cm2 vs. 0.16 cm2, mean value: 0.112 cm2 vs. 0.202 cm2. It could be shown that a larger fragment is more likely to dislocate than a smaller one.Clinical significanceThis study provides some evidence towards a better understanding of which diagnostic parameters and findings might be important in clinical decision making. Nevertheless, a “decision tree” for the correct therapy of MCD could not be determined in this study.研究目的 本研究旨在对比经确诊为双侧内侧冠状突病（medial coronoid disease, MCD）且仅表现单侧前肢跛行的犬的放射学与计算机断层扫描（computed tomographic, CT）影像学表现。 材料与方法 本研究回顾性分析了经确诊为双侧MCD且临床仅表现单侧前肢跛行的犬的医疗记录，包括其放射片与CT影像。根据每只犬的步态将其分为两组，以对比分析两组的放射学与CT数据：组I为受累但无跛行的肢体，组II为受累且伴跛行的肢体。采用多种评估体系，以明确对临床决策及个体化患犬治疗方案制定具有参考价值的影响因素。 结果 本研究纳入经CT确诊为MCD的84个受累肘关节（共42只犬）。放射学与CT分析均显示，组I与组II间存在显著差异。相较于组II，组I的改良国际肘关节工作组评分（modified International Elbow Working Group Score, IEWG）更低，滑车切迹硬化值仅存在轻微偏移，且骨碎片脱位的发生率更低。此外，组II前肢骨碎片的大小（中位数与均值）几乎为组I的两倍。两组骨碎片大小计算结果如下（组I vs 组II）：中位数0.09 cm² vs 0.16 cm²，均值0.112 cm² vs 0.202 cm²。本研究证实，骨碎片越大，脱位的可能性越高。 临床意义 本研究为明确临床决策中关键的影像学诊断参数与表现提供了一定依据。但本研究未能建立针对MCD规范治疗的“决策树”。