Association between medial meniscus extrusion and joint effusion persistence at 1 month in knee osteoarthritis: a multicenter retrospective cohort study.
8 affiliations
- 1Graduate School of Health Sciences, Morinomiya University of Medical Sciences: 1-26-16 Nankokita, Suminoe-ku, Osaka-shi, Osaka 559-8611, Japan.
- 2Yanase Orthopaedic Clinic, Japan.
- 3Department of Physiotherapy, Morinomiya University of Medical Sciences, Japan.
- 4Inclusive Medical Sciences Research Institute, Morinomiya University of Medical Sciences, Japan.
- 5Wada Orthopaedic Clinic, Japan.
- 6AR-Ex Oyamadai Orthopedic Clinic Tokyo Arthroscopy Center, Japan.
- 7AR-Ex Medical Research Center, Japan.
- 8Sakuhira Orthopaedic Clinic, Japan.
Abstract
[Purpose] Joint effusion is common in knee osteoarthritis (KOA) and contributes to functional limitations and disease progression. Persistence at 1 month is clinically relevant, as it may predispose patients to long-term effusion; however, the associated intra-articular lesions remain unclear. We aimed to identify intra-articular lesions associated with effusion persistence at 1 month using ultrasonography (US) for effusion quantification and magnetic resonance imaging (MRI) for lesion assessment. [Participants and Methods] This retrospective cohort study included 57 patients with medial compartment KOA and joint effusions. Joint effusion was quantified as the suprapatellar pouch distance (SPP-d) by US at baseline and 1 month. Baseline intra-articular lesions were graded using the MRI Osteoarthritis Knee Score. Participants were classified into persistent (SPP-d ≥4 mm) and non-persistent (SPP-d< 4 mm) effusion groups at 1 month. Binary logistic regression identified lesions independently associated with persistence. [Results] The persistent effusion group (n=40) showed a significantly higher medial meniscus extrusion (MME) score than the non-persistent effusion group (n=17) at baseline. In multivariable logistic regression, the MME score was independently associated with effusion persistence (odds ratio, 6.42; 95% confidence interval, 1.95-21.1). [Conclusions] MME is independently associated with joint effusion persistence at 1 month.
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BibTeX
@article{fukuyama2026association,
title = {{Association between medial meniscus extrusion and joint effusion persistence at 1 month in knee osteoarthritis: a multicenter retrospective cohort study.}},
author = {Shunto Fukuyama and Masahiro Tsutsumi and Kengo Kawanishi and Syoya Nakanishi and Harumi Sasagase and Masahiro Ikezu and Tadashi Tanaka and Makoto Wada and Yoshizo Yanase and Shintarou Kudo},
journal = {Journal of physical therapy science},
year = {2026},
month = nov,
doi = {10.1589/jpts.38.492},
url = {https://europepmc.org/article/MED/42969010},
note = {CC BY-NC-ND},
}
RIS
TY - JOUR
TI - Association between medial meniscus extrusion and joint effusion persistence at 1 month in knee osteoarthritis: a multicenter retrospective cohort study.
AU - Shunto Fukuyama
AU - Masahiro Tsutsumi
AU - Kengo Kawanishi
AU - Syoya Nakanishi
AU - Harumi Sasagase
AU - Masahiro Ikezu
AU - Tadashi Tanaka
AU - Makoto Wada
AU - Yoshizo Yanase
AU - Shintarou Kudo
PY - 2026
DA - 2026/11/01
JO - Journal of physical therapy science
DO - 10.1589/jpts.38.492
UR - https://europepmc.org/article/MED/42969010
AB - [Purpose] Joint effusion is common in knee osteoarthritis (KOA) and contributes to functional limitations and disease progression. Persistence at 1 month is clinically relevant, as it may predispose patients to long-term effusion; however, the associated intra-articular lesions remain unclear. We aimed to identify intra-articular lesions associated with effusion persistence at 1 month using ultrasonography (US) for effusion quantification and magnetic resonance imaging (MRI) for lesion assessment. [Participants and Methods] This retrospective cohort study included 57 patients with medial compartment KOA and joint effusions. Joint effusion was quantified as the suprapatellar pouch distance (SPP-d) by US at baseline and 1 month. Baseline intra-articular lesions were graded using the MRI Osteoarthritis Knee Score. Participants were classified into persistent (SPP-d ≥4 mm) and non-persistent (SPP-d< 4 mm) effusion groups at 1 month. Binary logistic regression identified lesions independently associated with persistence. [Results] The persistent effusion group (n=40) showed a significantly higher medial meniscus extrusion (MME) score than the non-persistent effusion group (n=17) at baseline. In multivariable logistic regression, the MME score was independently associated with effusion persistence (odds ratio, 6.42; 95% confidence interval, 1.95-21.1). [Conclusions] MME is independently associated with joint effusion persistence at 1 month.
SN - 0915-5287
SN - 2187-5626
ER -