Grade 0 |
No Visible Hypoechoic Tissue |
Grade 1 |
Hypoechoic thickening between the bones that form a joint, not exceeding a line drawn between the tops of the bones |
Grade 2 |
Hypoechoic thickening visible above the line drawn between the tops of the bones that form a joint, but that does not extend to overlie the
diaphysis of either bone |
Grade 3 |
Hypoechoic thickening that extends to overlie either the proximal or distal diaphysis of one of the bones |
Grade 4 |
Hypoechoic thickening that extends to overlie both the proximal and distal diaphysis of the bones |