Derived Grade
NAACCR Item
NAACCR #1975| Code | Description |
|---|---|
| 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 |