A narrative review of lateral meniscus root tears and extrusion: techniques and outcomes.

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Abstract

Conflict of interest statement: Conflicts of Interest: All authors have completed the ICMJE uniform disclosure form (available at https://aoj.amegroups.com/article/view/10.21037/aoj-20-112/coif). The series “The Lateral Meniscus” was commissioned by the editorial office without any funding or sponsorship. HK serves as an unpaid editorial board member of Annals of Joint from September 2019 to August 2021. The authors have no other conflicts of interest to declare. 19. BMC Musculoskelet Disord. 2025 Oct 14;26(1):958. doi: 10.1186/s12891-025-09175-w. Radiographic evaluation of key anatomical markers in discoid lateral meniscus: a systematic review and meta-analysis. Jin X(1), Wu X(2), Mao Y(2), Yang Z(1), Wang H(3). Author information: (1)Department of Orthopedics, The Third People's Hospital of Bengbu, No. 38 Shengli Middle Road, Bengbu City, Anhui Province, 233099, PR China. (2)Department of Orthopedics, The Second Affiliated Hospital of Soochow University, No.1055, Sanxiang Road, Suzhou, Jiangsu Province, 215004, PR China. (3)Department of Orthopedics, The Third People's Hospital of Bengbu, No. 38 Shengli Middle Road, Bengbu City, Anhui Province, 233099, PR China. orthopaedics_why@163.com. PURPOSE: The lateral discoid meniscus (DLM), a common anatomical variant in Asian populations, is often linked to knee pain, restricted motion, and an increased risk of meniscal tears. Due to limitations of magnetic resonance imaging (MRI) in certain patients, this study aims to assess the efficacy of X-ray parameters in diagnosing DLM, focusing on key features: lateral tibial spine height (LTSH), lateral joint space distance (LJSD), fibular head height (FHH), lateral tibial plateau obliquity (LTPO), and the condylar cut-off sign. METHODS: A systematic review and meta-analysis were conducted using studies from PubMed, Embase, and Web of Science (January 2004 - October 2024). Studies with observational designs, X-ray measurements, and data on DLM were included. Mean difference (MD) and 95% CI analyses were performed using Review Manager and Stata. RESULTS: Nine studies involving 788 discoid menisci and 761 normal knees were included. LJSD and FHH were significantly larger in the DLM group (MD = 1.18 and - 3.03, P