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Post-operative deformation and extrusion of the discoid lateral meniscus following a partial meniscectomy with repair

  • Knee
  • Published:
Knee Surgery, Sports Traumatology, Arthroscopy Aims and scope

Abstract

Purpose

The purpose of this study was to investigate the morphology of the discoid lateral meniscus sequentially following a partial meniscectomy with repair using magnetic resonance imaging (MRI).

Methods

Nine patients with a symptomatic discoid lateral meniscus with a peripheral tear were enrolled in this study, and a partial meniscectomy with repair was performed arthroscopically. An MRI examination was performed 2 weeks after surgery (before weight bearing was permitted) and again 6 months after surgery (when sporting activities could resume). The width, height and distance of the discoid lateral meniscus were measured. The distance was defined as the distance between the edges of the discoid lateral meniscus and the tibia.

Results

The width of the anterior, middle and posterior segments significantly decreased from 2 weeks to 6 months after surgery. The height of the middle and posterior segments significantly increased from 2 weeks to 6 months after surgery, whereas the height of the anterior segment did not significantly change. The distance of the anterior, middle and posterior segments significantly decreased from 2 weeks to 6 months after surgery.

Conclusion

The discoid lateral meniscus exhibited deformation and extrusion from 2 weeks to 6 months after a partial meniscectomy with repair. Therefore, the function of load transmission might not be maintained appropriately after surgery.

Level of evidence

IV.

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Authors and Affiliations

  1. Department of Orthopedic Sports Medicine, Hoshigaoka Medical Center, 4-8-1 Hoshigaoka, Hirakata, Osaka, 573-8511, Japan

    Tomohiko Matsuo, Kazutaka Kinugasa, Kousuke Sakata & Masayuki Hamada

  2. Department of Orthopedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamada-oka, Suita, Osaka, 565-0871, Japan

    Tomoki Ohori & Tatsuo Mae

Authors
  1. Tomohiko Matsuo
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  2. Kazutaka Kinugasa
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  3. Kousuke Sakata
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  4. Tomoki Ohori
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  5. Tatsuo Mae
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  6. Masayuki Hamada
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Correspondence to Masayuki Hamada.

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The authors declare that they have no conflict of interest.

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There is no funding source.

Ethical approval

The appropriate institutional review board of Hoshigaoka Medical Center for human subject research approved this study (ID: 1603).

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Informed consent was obtained from all individual participants included in the study.

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Matsuo, T., Kinugasa, K., Sakata, K. et al. Post-operative deformation and extrusion of the discoid lateral meniscus following a partial meniscectomy with repair. Knee Surg Sports Traumatol Arthrosc 25, 390–396 (2017). https://doi.org/10.1007/s00167-016-4393-6

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  • DOI: https://doi.org/10.1007/s00167-016-4393-6

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