Table 2.

International Cartilage Repair Society Grading

Grade 0: Normal
Grade 1: Nearly normal	Soft indentation and/or superficial fissures and cracks
Grade 2: Abnormal	Lesions extending down to <50% of cartilage depth
Grade 3: Severely abnormal	Cartilage defects extending down >50% of cartilage depth as well as down to calcified layer and down to but not through the subchondral bone; blisters are included in this grade
Grade 4: Severely abnormal	Lesions extending through the subchondral bone plate and deeper defects through the trabecular bone