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Related Experiment Video

Updated: May 3, 2026

Clinical Protocol of Producing Adipose Tissue-Derived Stromal Vascular Fraction for Potential Cartilage Regeneration
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Ideal remaining meniscus width and risk factors for decrease in meniscus width after reshaping surgery in pediatric

Kyeong Baek Kim1, Seong Man Jeon2, Joo-Hwan Kim2

  • 1Department of Orthopedic Surgery, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Pusan National University School of Medicine, Yangsan, Republic of Korea.

The Knee
|July 22, 2025
PubMed
Summary
This summary is machine-generated.

Reshaping symptomatic discoid lateral meniscus (DLM) requires preserving over 8.5 mm width to prevent degeneration. Surgeons should consider patient risk factors like complete DLM type and meniscal height for better joint preservation.

Keywords:
Arthroscopic reshapingDiscoid lateral meniscusMRI analysisMeniscal widthMorphological changesPediatric

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Area of Science:

  • Orthopedic Surgery
  • Pediatric Orthopedics
  • Meniscal Pathology

Background:

  • Discoid lateral meniscus (DLM) is a congenital anomaly often presenting with symptoms in pediatric patients.
  • Arthroscopic reshaping is a common surgical treatment for symptomatic DLM.
  • Understanding optimal meniscal dimensions post-surgery is crucial for long-term joint health.

Purpose of the Study:

  • To determine the ideal remaining meniscal width after arthroscopic reshaping surgery for symptomatic DLM.
  • To identify preoperative risk factors associated with meniscal width changes after DLM reshaping.

Main Methods:

  • Retrospective analysis of 29 pediatric patients (39 knees) undergoing arthroscopic DLM reshaping.
  • Postoperative MRI assessment at 6 months and 1-2 years to measure meniscal width changes.
  • Logistic regression and ROC curve analyses to identify risk factors and optimal cut-off values.

Main Results:

  • Meniscal width significantly decreased postoperatively, especially in the midbody (up to 38.1% at 1-2 years).
  • Complete DLM type and smaller preoperative meniscal height (< 3.3 mm) were significant risk factors for width reduction.
  • Preserving a meniscal width of ≤ 8.5 mm post-surgery was associated with a residual width < 5 mm.

Conclusions:

  • An ideal remaining meniscal width of > 8.5 mm after DLM reshaping is recommended to minimize postoperative degeneration.
  • Surgeons should consider preserving more meniscal tissue in patients with complete DLM or preoperative meniscal height < 3.3 mm.
  • These findings aid in optimizing surgical techniques for improved long-term joint preservation in pediatric DLM patients.