Five key ultrasound findings associated with medial meniscus posterior root tear

IF 1.6 4区医学 Q3 ORTHOPEDICS

Knee Pub Date : 2025-05-08 DOI:10.1016/j.knee.2025.04.021

Manase Nishimura , Yasushi Takata , Yosuke Shima , Kenichi Goshima , Kengo Shimozaki , Mitsuhiro Kimura , Naoki Takemoto , Kentaro Fujita , Satoru Demura , Junsuke Nakase

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引用次数: 0

Abstract

Purpose

Medial meniscus posterior root tear (MMPRT) is a critical condition leading to knee osteoarthritis. Although MRI is the standard diagnostic tool, its availability and cost can be limiting. This study aimed to identify characteristic ultrasound (US) findings of MMPRT and determine the criteria for recommending MRI.

Methods

This multicenter prospective study included 100 patients (101 knees, mean age 58.3 ± 11.2 years, 58 males and 42 females) with medial knee joint pain. All patients underwent US and MRI evaluations. US findings included joint effusion, synovial hypertrophy, and medial meniscus extrusion (MME) in the supine, 90° flexion, and standing positions. Color Doppler evaluation of Doppler signals (DSs) in the bursa and through the femur and tibia were performed. Statistical analysis compared US findings between MMPRT and non-MMPRT groups.

Results

The MMPRT group showed significantly higher rates of joint effusion (p = 0.028) and increased MME in all positions (p < 0.001). MME changed from 0° to 90° knee flexion (p = 0.003). Color Doppler evaluations revealed DSs through the femur (p = 0.008) and tibia (p = 0.013). Horizontal meniscal tears were more frequent in the non-MMPRT group (p < 0.001). For three or more positive parameters, sensitivity and specificity were 80% and 82.7%, respectively.

Conclusion

Five key US findings—joint effusion, increased MME, smaller MME change in knee flexion, fewer horizontal meniscal tears, and increased DSs through the femur and tibia—are characteristic of MMPRT. These suggest that US can effectively identify patients requiring MRI, facilitating early management.

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与内侧半月板后根撕裂相关的五个关键超声表现

目的：内侧半月板后根撕裂（MMPRT）是导致膝关节骨性关节炎的重要疾病。虽然核磁共振成像是标准的诊断工具，但它的可用性和成本是有限的。本研究旨在确定MMPRT的特征性超声（US）表现，并确定推荐MRI的标准。方法本多中心前瞻性研究纳入100例膝关节内侧疼痛患者（101个膝关节，平均年龄58.3±11.2岁，男58例，女42例）。所有患者均进行了US和MRI评估。美国的发现包括关节积液，滑膜肥大，内侧半月板挤压（MME）在仰卧，90°屈曲和站立的位置。对滑囊内、股骨和胫骨内的多普勒信号（DSs）进行彩色多普勒评价。统计分析比较了MMPRT组和非MMPRT组的美国结果。结果MMPRT组关节积液率显著升高（p = 0.028），各部位MME均升高(p <；0.001)。MME从膝关节屈曲0°到90°变化（p = 0.003）。彩色多普勒检查显示DSs通过股骨（p = 0.008）和胫骨（p = 0.013）。水平半月板撕裂在非mmprt组更常见(p <；0.001)。3个及以上阳性参数的敏感性为80%，特异性为82.7%。结论关节积液、MME增加、膝关节屈曲时MME变化较小、水平半月板撕裂减少、通过股骨和胫骨的DSs增加是MMPRT的特征。这些提示US可以有效识别需要MRI的患者，便于早期处理。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Knee 医学-外科

CiteScore

3.80

自引率

5.30%

发文量

171

审稿时长

6 months

期刊介绍： The Knee is an international journal publishing studies on the clinical treatment and fundamental biomechanical characteristics of this joint. The aim of the journal is to provide a vehicle relevant to surgeons, biomedical engineers, imaging specialists, materials scientists, rehabilitation personnel and all those with an interest in the knee. The topics covered include, but are not limited to: • Anatomy, physiology, morphology and biochemistry; • Biomechanical studies; • Advances in the development of prosthetic, orthotic and augmentation devices; • Imaging and diagnostic techniques; • Pathology; • Trauma; • Surgery; • Rehabilitation.