Department of Radiology, Faculty of Medicine, Ege University, Izmir, Turkey.
Department of Orthopaedics and Traumatology, Kusadasi State Hospital, Aydin, Turkey.
Knee. 2020 Oct;27(5):1542-1550. doi: 10.1016/j.knee.2020.08.009. Epub 2020 Sep 1.
The present study aimed to evaluate stress radiography and magnetic resonance imaging (MRI) findings in medial meniscus posterior root tears (MMPRTs).
The study included 27 patients (26 females, mean age, 53.52 years) who underwent high tibial osteotomy and in whom medial menisci were concurrently examined arthroscopically. Preoperative stress radiographs and MRI series in 14 cases with root tears (MMPRT group, detected arthroscopically) and in 13 cases without tears (control group) were evaluated. Joint spaces measured on the stress radiographs were compared between the operated and opposite knees in each group.
On the varus stress radiographs, the mean lateral joint space of the operated knees was significantly wider than that of the opposite knees in the MMPRT group (P = 0.007). Upon MRI studies, meniscal extrusion was significantly more common in the MMPRT group than in the control group. Moreover, the amount of meniscal extrusion was correlated with the tear size.
Widening of the lateral joint space on the varus stress radiography was higher in the cases with root tears. Therefore, we propose that stress radiographs can be helpful in the diagnosis of MMPRT.
本研究旨在评估内侧半月板后根撕裂（MMPRT）的应力量线片和磁共振成像（MRI）表现。
本研究纳入了 27 例（26 名女性，平均年龄 53.52 岁）接受高胫骨截骨术且同期行关节镜检查内侧半月板的患者。评估了 14 例有根撕裂（MMPRT 组，关节镜下发现）和 13 例无撕裂（对照组）患者的术前应力量线片和 MRI 系列。比较了每组手术侧和对侧膝关节的应力量线片上的关节间隙。
在外翻应力量线片上，MMPRT 组手术侧膝关节的外侧关节间隙明显宽于对侧（P=0.007）。在 MRI 研究中，MMPRT 组的半月板突出明显多于对照组。此外，半月板突出的程度与撕裂的大小相关。
有根撕裂的病例在外翻应力量线片上的外侧关节间隙增宽更高。因此，我们建议应力量线片有助于 MMPRT 的诊断。
