Santos Marcos P, Gutierrez-Nibeyro Santiago D, McKnight Alexia L, Singh Kuldeep
Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois, Urbana, IL.
McKnight Insight, LLC, Chadds Ford, PA.
Vet Radiol Ultrasound. 2015 Jul-Aug;56(4):407-16. doi: 10.1111/vru.12233. Epub 2014 Dec 28.
With the recent introduction of a 0.25T rotating MRI system, clinical evaluation of the equine stifle joint is now possible in the average equine athlete. A recent publication described common abnormalities of horses with stifle lameness detected with a low-field MRI system; however, postmortem corroboration of the lesions detected was not possible. Therefore, our objective was to compare postmortem findings with low-field MRI findings in equine cadaver stifle joints. Ten fresh cadaver stifle joints from horses without clinical signs of stifle disease were evaluated using low-field MRI, gross dissection, and histopathology. In eight stifles, either the lateral or medial cranial meniscotibial ligament had an irregular shape, fiber separation, or moderate abnormal signal intensity (SI) on all sequences. In five stifles, the medial femoral condyle had articular cartilage fibrillation with or without an osteochondral defect over the weight bearing surface of the medial femoral condyle. All stifles had abnormal SI on all sequences within the patellar ligaments that corresponded with adipose tissue infiltrating between the collagen bundles. Other abnormalities identified included articular cartilage fibrillation of the tibial condyles in three stifles, and articular cartilage fibrillation with chondral defects in the patella in three stifles. All abnormalities detected with low-field MRI were corroborated by gross dissection. Findings from the current study supported the use of low-field MRI for detection of stifle joint lesions in horses and demonstrated that some stifle joint pathologies may be subclinical in horses.
随着最近一台0.25T旋转式MRI系统的引入，现在普通的赛马运动员的马 stifle 关节的临床评估成为可能。最近的一篇出版物描述了用低场MRI系统检测到的患有stifle跛行的马匹的常见异常情况；然而，无法对检测到的病变进行死后确证。因此，我们的目的是比较马尸体stifle关节的死后检查结果与低场MRI检查结果。使用低场MRI、大体解剖和组织病理学对10个来自没有stifle疾病临床症状的马匹的新鲜尸体stifle关节进行了评估。在8个stifle中，外侧或内侧颅侧半月板胫骨韧带在所有序列上都有不规则形状、纤维分离或中等程度的异常信号强度（SI）。在5个stifle中，内侧股骨髁在其负重表面有或没有骨软骨缺损的关节软骨纤维化。所有stifle在髌韧带内的所有序列上都有异常SI，这与胶原束之间的脂肪组织浸润相对应。其他发现的异常包括3个stifle中胫骨髁的关节软骨纤维化，以及3个stifle中髌骨的关节软骨纤维化伴软骨缺损。低场MRI检测到的所有异常都通过大体解剖得到了确证。本研究的结果支持使用低场MRI检测马匹的stifle关节病变，并表明一些stifle关节病变在马匹中可能是亚临床的。
