Okamura Hiroki, Ishikawa Hiroki, Ohno Takuya, Fujita Shogo, Yamakami Shigeo, Akezuma Hirotaka, Ishikawa Koji, Inagaki Katsunori
Department of Orthopaedic Surgery, Nihon Koukan Hospital, 1-2-1 Koukandori, Kawasaki-ku, Kawasaki City, Kanagawa Prefecture, 210-0852, Japan.
Department of Orthopaedic Surgery, Showa University School of Medicine, Tokyo, 142-8555, Japan.
J Exp Orthop. 2021 Oct 30;8(1):99. doi: 10.1186/s40634-021-00421-3.
Early detection of medial meniscus posterior root tear (MMPRT) is important in preventing the rapid onset and progression of degenerative knee disease. Diagnosis is facilitated by the availability of non-weight-bearing X-ray view, but information on the X-ray characteristics of MMPRT is scarce. Here, we conducted a pilot study of the X-ray characteristics of MMPRT on non-weight-bearing tunnel view.
We retrospectively reviewed 43 consecutive patients treated in the outpatient department for medial knee pain or popliteal pain. Patients were divided into MMPRT (21 knees) and non-MMPRT groups (22 knees). We investigated X-ray characteristics and magnetic resonance imaging findings. Femorotibial angle, posterior tibial slope, medial tibial eminence (MTE)-medial femoral condyle (MFC) distance (contralateral and affected sides, and difference between the two), medial tibiofemoral joint (MTFJ) width (contralateral and affected sides, and difference between the two), and meniscus radial dislocation between the groups were evaluated using the Mann-Whitney U test. The association between X-ray characteristics and MMPRT was determined using univariate and multivariate logistic regression analyses.
A highly significant difference between the affected and contralateral sides was seen in MTFJ width and MTE-MFC distance on non-weight-bearing tunnel view between the MMPRT and non-MMPRT groups. Moreover, a difference in MTFJ width of <-0.575 mm and in MTE-MFC distance of >0.665 mm between the affected and contralateral sides was useful in predicting MMPRT.
The non-weight-bearing tunnel view is useful for the initial diagnosis of MMPRT. Prospective evaluation in a larger population is warranted.
早期发现内侧半月板后根撕裂（MMPRT）对于预防退行性膝关节疾病的快速发作和进展至关重要。非负重X线视图有助于诊断，但关于MMPRT的X线特征的信息却很匮乏。在此，我们对非负重隧道视图下MMPRT的X线特征进行了一项初步研究。
我们回顾性分析了43例因膝关节内侧疼痛或腘窝疼痛在门诊接受治疗的连续患者。患者被分为MMPRT组（21个膝关节）和非MMPRT组（22个膝关节）。我们研究了X线特征和磁共振成像结果。使用Mann-Whitney U检验评估两组之间的股胫角、胫骨后倾、内侧胫骨嵴（MTE）-内侧股骨髁（MFC）距离（对侧和患侧，以及两者之间的差异）、内侧胫股关节（MTFJ）宽度（对侧和患侧，以及两者之间的差异）以及半月板径向脱位情况。使用单因素和多因素逻辑回归分析确定X线特征与MMPRT之间的关联。
在MMPRT组和非MMPRT组之间，非负重隧道视图下患侧与对侧的MTFJ宽度和MTE-MFC距离存在高度显著差异。此外，患侧与对侧之间MTFJ宽度<-0.575 mm以及MTE-MFC距离>0.665 mm的差异有助于预测MMPRT。
非负重隧道视图对MMPRT的初步诊断有用。有必要在更大规模人群中进行前瞻性评估。
