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Age, male sex, higher posterior tibial slope, deep sulcus sign, bone bruises on the lateral femoral condyle, and concomitant medial meniscal tears are risk factors for lateral meniscal posterior root tears: a systematic review and meta-analysis

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Knee Surgery, Sports Traumatology, Arthroscopy Aims and scope

Abstract

Purpose

Lateral meniscus posterior root tears (LMPRTs) are commonly found in patients with anterior cruciate ligament (ACL) injuries. However, risk factors for LMPRTs are not well known. This study was designed to systematically review the available evidence regarding risk factors associated with LMPRTs.

Methods

The PubMed, EMBASE, Cochrane Library, and Web of Science databases were searched for papers containing the key words “lateral meniscus posterior root tears”, “LMPRTs” and “risk factor”. Inclusion screening, data extraction, and quality assessment of the included articles were conducted independently by two authors. Statistical analysis was conducted to determine risk factors for LMPRTs.

Result

Seventeen studies with a total sample size of 6, 589 patients were identified. The pooled prevalence of LMPRTs was 9.6% (range, 5.1–33.8%) for ACL injury. Significant risk factors included a patient age of < 30 [OR = 1.4, 95% CI (1.07, 1.84), p = 0.01], male sex [OR = 1.50, 95% CI (1.24,1.81), p = 0.01], higher body mass index (BMI) [MD = 0.45, 95% CI (0.13, 0.76), p < 0.01], higher lateral posterior tibial slope (LPTS) [MD = 2.22, 95% CI (1.37, 3.07), p < 0.01], deep sulcus sign [OR = 5.76, 95% CI (1.35, 24.52), p < 0.01] and bone bruises on lateral femoral condyle [OR = 4.88, 95% CI (1.27, 18.77), p < 0.01], lateral meniscal extrusion > 1 mm [OR = 5.56, 95% CI (1.52, 20.29), p < 0.01] and > 3 mm [OR = 12.91 95% CI (1.28, 130.01), p < 0.01], medial meniscal tears [OR = 1.40, 95% CI (1.12, 1.75), p < 0.01], and medial ramp lesions [OR = 2.29, 95% CI (1.35, 3.89), p < 0.01].

Conclusion

Age below 30, male, higher BMI, higher LPTS, deep sulcus sign, bone bruises on lateral femoral condyle, lateral meniscal extrusion, medial meniscal tear, and medial ramp lesion are risk factors for LMPRTs.

Level of evidence

Level IV.

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Funding

This study was supported by Cuiying Scientific and Technological Innovation Program of Lanzhou University Second Hospital (grant number CY2020-BJ03, CY2021-MS-B02), Gansu Natural Science Foundation Youth Project (20JR10RA712) and Natural Science Foundation of Gansu Province (21JR7RA393).

Author information

Author notes

  1. Meng Wu, Jin Jiang, and Zhongcheng Liu have contributed equally to this work.

Authors and Affiliations

  1. Department of Orthopaedics, Lanzhou University Second Hospital, No. 82 Cuiyingmen, Chengguan District, Lanzhou, 730030, Gansu, China

    Meng Wu, Jin Jiang, Zhongcheng Liu & Yayi Xia

  2. Department of Orthopaedics, Yuzhong Hospital of Traditional Chinese Medicine, No. 54, Yiwu Road, Chengguan Town, Yuzhong County, Lanzhou, 730030, Gansu, China

    Xiaowen Dai

  3. Department of Pharmacy, Lanzhou University Second Hospital, No. 82 Cuiyingmen, Chengguan District, Lanzhou, 730030, Gansu, China

    Yumei Dong

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Contributions

WM and JJ conceived the project, the main conceptual ideas, and the proof sketch. LZC, DXW, and DYM extracted data and conducted the statistical analysis, WM and XYY wrote the manuscript, and WM, DXW, and DYM revised this manuscript. All authors discussed the results and contributed to the final manuscript.

Corresponding author

Correspondence to Yayi Xia.

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Conflict of interest

All authors declared that there is no conflict of interest.

Ethical approval

All data of this systematic review was extracted from the included articles that have been published previously. This systematic review does not contain any human participants or animal performed by any of the authors.

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Wu, M., Jiang, J., Liu, Z. et al. Age, male sex, higher posterior tibial slope, deep sulcus sign, bone bruises on the lateral femoral condyle, and concomitant medial meniscal tears are risk factors for lateral meniscal posterior root tears: a systematic review and meta-analysis. Knee Surg Sports Traumatol Arthrosc 30, 4144–4155 (2022). https://doi.org/10.1007/s00167-022-06967-8

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