Meniscal extrusion

Meniscal extrusion or subluxation refers to the peripheral meniscal margin extending beyond the external aspect of the tibiofemoral compartment of the knee.


This can result from disruption of collagen fibers within the meniscus that provide hoop strength 8.


Radiographic features

Meniscal extrusion can be assessed reliably on ultrasound and MRI 5 as well as on CT 7. Significant meniscal extrusion has been variably defined as ≥3 mm 1 or ≥4 mm 6

Knee pathology

The knee is a complex synovial joint that can be affected by a range of pathologies:

Article information

rID: 40591
Tag: knee
Synonyms or Alternate Spellings:
  • Meniscal subluxation
  • Extrusion of meniscus
  • Extrusion of menisci

ADVERTISEMENT: Supporters see fewer/no ads

Cases and figures

  • Case 1
    Drag here to reorder.
  • Case 2
    Drag here to reorder.
  • Coronal view of m...
    Case 3
    Drag here to reorder.
  • Case 4
    Drag here to reorder.
  • Case 5
    Drag here to reorder.
  • Case 6: on x-ray
    Drag here to reorder.
  • Case 6: on ultrasound
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.