Skip to main content

Table 3 Demonstrating the MRI grading of chondromalacia patella depending on the International Cartilage Repair Society (ICRS) and Outerbridge grading system [5]

From: Role of magnetic resonance imaging in the evaluation of the anterior knee pain

GradeMRI appearance
IFocally increased signal intensity but with preserved contour.
IIA swollen or frayed hyaline cartilage that may extend to the surface but with < 50% cartilage thickness loss.
III> 50% hyaline cartilage thickness loss but with focal surface ulceration of the hyaline cartilage.
IVTotal loss of the hyaline cartilage thickness with underlying reactive osseous changes.