| 1 |
G1: Sum of differentiation score, mitotic count score and necrosis score equals 2 or 3
Stated as FNCLCC Grade 1 |
| 2 |
G2: Sum of differentiation score, mitotic count score and necrosis score of 4 or 5
Stated as FNCLCC Grade 2 |
| 3 |
G3: Sum of differentiation score, mitotic count score and necrosis score of 6, 7, or 8
Stated as FNCLCC Grade 3 |
| A |
Well differentiated |
| B |
Moderately differentiated |
| C |
Poorly differentiated |
| D |
Undifferentiated, anaplastic |
| H |
Stated as "high grade" only |
| 9 |
Grade cannot be assessed (GX); Unknown |
