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| Code | Description |
|---|---|
| L | Low: 5 or fewer mitoses per 5 square mm |
| H | High: Over 5 mitoses per 5 square mm |
| A | Well differentiated |
| B | Moderately differentiated |
| C | Poorly differentiated |
| D | Undifferentiated, anaplastic |
| 9 | Grade cannot be assessed; Unknown |
