Chondromalacia grading: illustrations

Case contributed by Dr Matt Skalski

Presentation

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Patient Data

Age: Not applicable
Modality: Diagram

Illustration of the Outerbridge classification of chondrosis. The diagram demonstrates the classification on patellar cartilage for ease of concept demonstration due to cartilage thickness, but it applies elsewhere as well. 

  • grade 0 - normal
  • grade 1 - cartilage signal abnormality, but appears architecturally intact
  • grade 2 - surface fraying or focal defects involving less than 50% of cartilage thickness
  • grade 3 - defects involving more than 50% of cartilage thickness, without bone edema
  • grade 4 - full-thickness cartilage defect/loss with associated bone marrow edema

Case Discussion

Illustration of the Outerbridge classification of chondrosis. The diagram demonstrates the classification on patellar cartilage for ease of concept demonstration due to cartilage thickness, but applies elsewhere as well. The classification was initially devised for chondromalacia patella grading.

  • grade 0 - normal
  • grade 1 - cartilage signal abnormality, but appears architecturally intact
  • grade 2 - surface fraying or focal defects involving less than 50% of cartilage thickness
  • grade 3 - defects involving more than 50% of cartilage thickness, without bone edema
  • grade 4 - full-thickness cartilage defect/loss with associated bone marrow edema
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Case Information

rID: 43787
Case created: 25th Mar 2016
Last edited: 20th Apr 2016
Inclusion in quiz mode: Excluded
Excluded from licensing

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