Abstract：
BACKGROUND: Hyperintensity in the proximal lateral collateral ligament (LCL) is often confusing. This appearance may be alone or accompany other pathologies.
OBJECTIVE: To investigate the relationship between the signal intensity (SI) change in the proximal LCL and the knee joint pathologies.
METHODS: The knee MRI scans taken between 2020 and 2022 were queried retrospectively. Patients with acute trauma, instability, knee surgery, or high-grade osteoarthritis were excluded. Included patients were divided into two groups as normal SI and increased SI according to proximal LCL. The difference in ligamentous and meniscal pathologies between the two groups was analyzed using a chi-square test. Inter-observer agreement analysis was performed on 50 randomly selected patients.
RESULTS: A total of 351 patients (139 men [39.6%], 212 women [60.4%]; median age = 37 years; interquartile range = 67 years) were included. There were 114 (32.5%) LCLs with normal SI and 237 (67.5%) LCLs with increased SI. Normal SI and increased SI groups had a significant difference in terms of joint side, median age, patellar tendon SI, anterior cruciate ligament SI, and medial collateral ligament SI (P = 0.004, P = 0.004, P = 0.001, P = 0.011, P = 0.004, respectively). A significant difference between the results of two separate LCL examinations in coronal + axial and coronal-only planes (P <0.001). Inter-observer agreement was found to be good to excellent.
CONCLUSIONS: Hyperintensity in the proximal LCL was more common on the right joint side, in older patients, and patients with hyperintensity in the proximal patellar tendon, anterior cruciate ligament, and medial collateral ligament. Evaluating the LCL only in the coronal plane overestimates the hyperintensity.
OBJECTIVE: To investigate the relationship between the signal intensity (SI) change in the proximal LCL and the knee joint pathologies.
METHODS: The knee MRI scans taken between 2020 and 2022 were queried retrospectively. Patients with acute trauma, instability, knee surgery, or high-grade osteoarthritis were excluded. Included patients were divided into two groups as normal SI and increased SI according to proximal LCL. The difference in ligamentous and meniscal pathologies between the two groups was analyzed using a chi-square test. Inter-observer agreement analysis was performed on 50 randomly selected patients.
RESULTS: A total of 351 patients (139 men [39.6%], 212 women [60.4%]; median age = 37 years; interquartile range = 67 years) were included. There were 114 (32.5%) LCLs with normal SI and 237 (67.5%) LCLs with increased SI. Normal SI and increased SI groups had a significant difference in terms of joint side, median age, patellar tendon SI, anterior cruciate ligament SI, and medial collateral ligament SI (P = 0.004, P = 0.004, P = 0.001, P = 0.011, P = 0.004, respectively). A significant difference between the results of two separate LCL examinations in coronal + axial and coronal-only planes (P <0.001). Inter-observer agreement was found to be good to excellent.
CONCLUSIONS: Hyperintensity in the proximal LCL was more common on the right joint side, in older patients, and patients with hyperintensity in the proximal patellar tendon, anterior cruciate ligament, and medial collateral ligament. Evaluating the LCL only in the coronal plane overestimates the hyperintensity.
摘要：
背景：近端外侧副韧带（LCL）的高强度通常令人困惑。这种外观可以是单独的或伴随其他病理。
目的：研究近端LCL的信号强度（SI）变化与膝关节病变之间的关系。
方法：回顾性查询了2020年至2022年间进行的膝关节MRI扫描。急性创伤患者,不稳定性,膝盖手术,或高级别骨关节炎被排除.纳入的患者根据近端LCL分为正常SI和增加SI两组。使用卡方检验分析两组之间韧带和半月板病理的差异。对50例随机选择的患者进行观察者间一致性分析。
结果：共351例患者（男性139例[39.6%]，212名女性[60.4%]；中位年龄=37岁；四分位距=67岁）被包括在内。有114例(32.5%)SI正常的LCL和237例(67.5%)SI增加的LCL。正常SI组和增加SI组在关节侧有显著差异，中位年龄,髌腱SI,前交叉韧带SI,和内侧副韧带SI（分别为P=0.004，P=0.004，P=0.001，P=0.011，P=0.004）。在冠状轴平面和仅冠状平面的两个单独的LCL检查结果之间存在显着差异（P<0.001）。观察员之间的协议被认为是好到极好的。
结论：近端LCL的高强度在右关节侧更常见，在老年患者中，和近端髌腱高强度的患者，前交叉韧带,和内侧副韧带.仅在冠状平面中评估LCL会高估高强度。
目的：研究近端LCL的信号强度（SI）变化与膝关节病变之间的关系。
方法：回顾性查询了2020年至2022年间进行的膝关节MRI扫描。急性创伤患者,不稳定性,膝盖手术,或高级别骨关节炎被排除.纳入的患者根据近端LCL分为正常SI和增加SI两组。使用卡方检验分析两组之间韧带和半月板病理的差异。对50例随机选择的患者进行观察者间一致性分析。
结果：共351例患者（男性139例[39.6%]，212名女性[60.4%]；中位年龄=37岁；四分位距=67岁）被包括在内。有114例(32.5%)SI正常的LCL和237例(67.5%)SI增加的LCL。正常SI组和增加SI组在关节侧有显著差异，中位年龄,髌腱SI,前交叉韧带SI,和内侧副韧带SI（分别为P=0.004，P=0.004，P=0.001，P=0.011，P=0.004）。在冠状轴平面和仅冠状平面的两个单独的LCL检查结果之间存在显着差异（P<0.001）。观察员之间的协议被认为是好到极好的。
结论：近端LCL的高强度在右关节侧更常见，在老年患者中，和近端髌腱高强度的患者，前交叉韧带,和内侧副韧带.仅在冠状平面中评估LCL会高估高强度。
