Cephalic laxity of the posterior root of lateral meniscus: Arthroscopic sign of meniscal hypermobility. Proposal for a new arthroscopic classification

IF 1.6 4区医学 Q3 ORTHOPEDICS

Knee Pub Date : 2025-05-22 DOI:10.1016/j.knee.2025.05.010

Pablo Agustín Ramos Guarderas , Pablo David Ramos Murillo , Gonzalo Fernando Arteaga Guerrero , Medardo Javier Vargas Morante , Carlos Patricio Peñaherrera Carrillo , Francisco Endara Urresta , Daniel Alejandro Ramos Murillo , Alejandro Xavier Barros Castro

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引用次数: 0

Abstract

Introduction

The lateral meniscus (LM) has greater mobility than the medial meniscus (MM) due to the lack of meniscocapsular insertions at the popliteal hiatus. Hypermobile lateral meniscus (HLM) refers to excessive anterior translation of the posterior horn of the lateral meniscus (PHLM), often causing knee pain and locking, particularly during kneeling. This study investigates cephalic laxity of the posterior root of the lateral meniscus as an arthroscopic sign of meniscal hypermobility.

Objectives

To assess whether the degree of cephalic laxity correlates with lateral meniscus hypermobility and determine its potential as an arthroscopic diagnostic sign for HLM to establish a classification.

Methods

This observational descriptive case series study was conducted at a sports medicine center in Ecuador from November 2023 to May 2024. Inclusion criteria comprised patients undergoing knee arthroscopy within the study period, excluding those with posterior root injury, unstable meniscal tears, diffuse grade IV Outerbridge chondropathy, and posterolateral corner injuries. Data were analyzed using statistical software, focusing on arthroscopic findings and patient symptoms.

Results

Among 106 patients (57% male, 43% female; average age 38.9), a significant correlation was found between posterolateral knee pain and meniscal hypermobility. There was a 76% probability of increased pain during hyperflexion in patients with posterolateral knee pain. Pearson correlation coefficients confirmed the relationship between cephalic laxity and meniscal hypermobility.

Conclusion

Cephalic laxity of the posterior root of the lateral meniscus may serve as a valid arthroscopic diagnostic sign for HLM. The classification of lateral meniscus posterior root laxity (LMPRL) is reliable for surgical management.

Level of evidence: IV.

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外侧半月板后根的头侧松弛：半月板过度活动的关节镜征象。提出一种新的关节镜分类方法

外侧半月板（LM）比内侧半月板（MM）具有更大的活动性，因为在腘窝孔处缺少半月板囊插入物。过度移动外侧半月板（HLM）是指外侧半月板（phm）后角过度前移，常引起膝关节疼痛和锁定，特别是在跪时。本研究探讨外侧半月板后根的头侧松弛作为半月板过度活动的关节镜征象。目的评估头侧松弛程度是否与外侧半月板过度活动相关，并确定其作为HLM关节镜诊断标志的潜力，以建立分类。方法观察性描述性病例系列研究于2023年11月至2024年5月在厄瓜多尔一家运动医学中心进行。纳入标准包括在研究期间接受膝关节镜检查的患者，不包括后根损伤、不稳定半月板撕裂、弥漫性IV级外桥软骨病和后外侧角损伤的患者。使用统计软件对数据进行分析，重点关注关节镜检查结果和患者症状。结果106例患者中，男性57%，女性43%；平均年龄38.9岁)，膝关节后外侧疼痛与半月板过度活动之间存在显著相关性。在膝关节后外侧疼痛的患者中，有76%的可能性在过度屈伸期间增加疼痛。Pearson相关系数证实了头侧松弛与半月板过度活动之间的关系。结论外侧半月板后根头侧松弛可作为HLM的关节镜诊断标志。外侧半月板后根松弛（lprl）的分类是可靠的手术治疗。证据等级：四级。

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.