BACKGROUND Chondromalacia of the cranial medial femoral condyle (CMFC) is a potential cause of stifle lameness in adult horses. However, there is scant published evidence of either its occurrence or its clinical significance. OBJECTIVES To document the occurrence of CMFC seen during diagnostic arthroscopy in adult horses with stifle lameness and to investigate its prognostic significance. STUDY DESIGN Retrospective cohort study. METHODS The records were reviewed of all horses with unilateral or bilateral lameness localised to the stifle that underwent diagnostic arthroscopy of the cranial medial femorotibial joint at a UK equine hospital. The surgical findings were noted from each. Case outcomes were determined by unstructured telephone discussions with owners. A satisfactory outcome was defined as a horse that was in ridden work without ongoing anti-inflammatory medication. Multivariable logistic regression was used to create a model with an outcome time point at 12 months post-operatively. RESULTS One hundred and four horses were included in the study. CMFC was found in 79. In 25 CMFC was the only finding, 54 horses had CMFC plus other pathology and 25 had other pathology, but no CMFC. At 12 months horses with CMFC were 9.9 (95% CI 2.2 - 45.0, p<0.01) times more likely to have an unsatisfactory outcome than horses without CMFC. MAIN LIMITATIONS The study relied on retrospective analysis of clinical notes and archived arthroscopy videos. Assessment of outcome was determined by unstructured telephone interview and therefore there is potential for reporting errors to exist. CONCLUSIONS CMFC is a common arthroscopic finding in horses with stifle lameness and is significantly associated with an increased likelihood of the horse not being in ridden work at long term follow up.

中文翻译：

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颅内股骨髁软骨软化症；在患有窒息性跛行的成年马群中，它的发生及其与临床结果的关联。

背景技术颅内股骨髁(CMFC)软骨软化是成年马膝关节跛行的潜在原因。然而，很少有已发表的证据表明其发生或临床意义。目的 记录膝关节跛行成年马诊断性关节镜检查中 CMFC 的发生情况，并探讨其预后意义。研究设计 回顾性队列研究。方法 对在英国一家马医院接受颅内侧股胫关节诊断性关节镜检查的所有单侧或双侧跛行局限于膝关节的马的记录进行审查。每个手术结果都被记录下来。案例结果是通过与业主的非结构化电话讨论确定的。令人满意的结果被定义为在没有持续抗炎药物的情况下骑马工作。多变量逻辑回归用于创建一个模型，其结果时间点为术后 12 个月。结果 104 匹马被纳入研究。CMFC 在 79 中发现。在 25 中，CMFC 是唯一的发现，54 匹马有 CMFC 加其他病理，25 匹马有其他病理，但没有 CMFC。在 12 个月时，患有 CMFC 的马比没有 CMFC 的马出现不满意结果的可能性高 9.9 (95% CI 2.2 - 45.0, p<0.01) 倍。主要局限 该研究依赖于临床记录和存档的关节镜视频的回顾性分析。结果评估是通过非结构化电话采访确定的，因此可能存在报告错误。