Abstract

Objective

To analyze the MRI characteristics of distal superficial medial collateral ligament (sMCL) tears and to identify features of tears displaced superficial to the pes anserinus (Stener-like lesion (SLL)).

Materials and methods

Knee MRI examinations at four institutions were selected which showed tears of the sMCL located distal to the joint line. MRIs were evaluated for a SLL, a wavy contour to the sMCL, and the location of the proximal sMCL stump. Additional coexistent knee injuries were recorded.

Results

The study included 51 patients (mean age, 28 years [sd, 12]). A SLL was identified in 20 of 51 cases. The proximal stump margin was located significantly (p < 0.01) more distal and more medial with a SLL (mean = 33 mm [sd = 11 mm] and mean = 6.5 mm [sd = 2.5 mm], respectively), than without a SLL (mean = 19 mm [sd = 16 mm] and mean = 4.8 mm [sd = 2.4 mm], respectively). Medial compartment osseous injury was significantly (p < 0.05) more common with a SLL (75%) than without a SLL (42%). The frequency of concomitant injuries in the group (ACL tear, 82%; PCL tear, 22%; deep MCL tear, 61%; lateral compartment osseous injury, 94%) did not differ significantly between patients with and without a SLL.

Conclusion

A distal sMCL tear should be considered when MRI depicts a wavy appearance of the sMCL. Distal sMCL tears have a frequent association with concomitant knee injuries, especially ACL tears and lateral femorotibial osseous injuries. A SLL is particularly important to recognize because of implications for treatment.

中文翻译：

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远端浅表内侧副韧带的眼泪：波征和其他相关的MRI表现

摘要

目的

分析远端浅表内侧副韧带（sMCL）泪液的MRI特征，并确定从小结到胸大肌（施泰纳样病灶（SLL））的泪液特征。

材料和方法

选择了在四个机构进行的膝部MRI检查，这些检查显示了位于关节线远端的sMCL的眼泪。评估MRI的SLL，sMCL的波状轮廓以及近端sMCL树桩的位置。记录了其他并存的膝关节损伤。

结果

这项研究包括51名患者（平均年龄28岁[sd，12]）。在51例病例中有20例被确定为SLL。与没有SLL的情况相比，SLL的远侧残端和内侧位置明显更远（p <0.01）（平均分别为33 mm [sd = 11 mm]和平均值= 6.5 mm [sd = 2.5 mm]）。 （平均值＝ 19mm [sd ＝ 16mm]和平均值＝ 4.8mm [sd ＝ 2.4mm]）。有SLL（75％）的患者比无SLL（42％）的患者更常见内侧隔骨性损伤（p <0.05）。伴或不伴有SLL的患者在该组中伴随受伤的频率（ACL撕裂为82％； PCL撕裂为22％； MCL深部撕裂为61％；外侧腔室骨性损伤为94％）之间没有显着差异。

结论

当MRI显示sMCL呈波浪形出现时，应考虑sMCL远端撕裂。sMCL远端泪液经常与膝关节损伤相关，尤其是ACL泪液和股骨外侧骨损伤。由于对治疗的影响，SLL的识别尤其重要。