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Related Experiment Video

Updated: Jul 22, 2026

Destabilization of the Medial Meniscus and Cartilage Scratch Murine Model of Accelerated Osteoarthritis
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Discoid menisci in children: MR features

J E Stark1, M J Siegel, E Weinberger

  • 1Mallinckrodt Institute of Radiology, St. Louis, MO 63110-1076, USA.

Journal of Computer Assisted Tomography
|July 1, 1995
PubMed
Summary

Discoid meniscus in children typically appears on MRI as a thickened meniscus with a slab shape and increased internal signal. This finding is crucial for diagnosing painful knees in pediatric patients.

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Area of Science:

  • Pediatric Orthopedics
  • Radiology
  • Medical Imaging

Background:

  • Discoid meniscus is a congenital anomaly.
  • It is more common in the lateral compartment.
  • Symptomatic discoid meniscus can cause knee pain in children.

Purpose of the Study:

  • To define the magnetic resonance (MR) imaging appearance of discoid meniscus in children.
  • To compare pediatric findings with adult standards.

Main Methods:

  • Retrospective review of 27 discoid lateral menisci in 22 children (age 5-17).
  • Evaluation of meniscal shape, signal intensity, and surrounding structures on MRI.
  • Clinical or surgical follow-up data analyzed for 16 patients.

Main Results:

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Last Updated: Jul 22, 2026

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  • Menisci classified as slab (20) or wedge (7) type.
  • Increased intrameniscal signal observed in 23 of 27 menisci.
  • Tears were found in 7 of 9 surgically evaluated patients with intrameniscal signal.

Conclusions:

  • Symptomatic discoid meniscus in children characteristically shows a diffusely thick meniscus on MRI.
  • A slab configuration and diffusely increased intrameniscal signal are key features.
  • Intrameniscal signal may or may not extend to the joint surface.