Grade | ||
---|---|---|
I | Structure | |
a. Normal | 0 | |
b. Surface irregularity | 1 | |
c. Pannus and surface irregularity | 2 | |
d. Clefts to transitional zone | 3 | |
e. Clefts to radial zone | 4 | |
f. Clefts to calcified zone | 5 | |
g. Complete disorganization | 6 | |
II | Cells | |
a. Normal | 0 | |
b. Diffuse hypercellularity | 1 | |
c. Cloning | 2 | |
d. Hypocellularity | 3 | |
III | Safranin–Orange staining | |
a. Normal | 0 | |
b. Slight reduction | 1 | |
c. Moderate reduction | 2 | |
d. Severe reduction | 3 | |
e. No dye note | 4 | |
IV | Tidemark integrity | |
a. Intact | 0 | |
b. Crossed by blood vessels | 1 |