| G1 (Well differentiated) |
Well Differentiated |
C14171 |
NCI Thesaurus |
Describes tumor cells that generally retain the appearance of normal cells and tend to grow and spread at a slower rate than undifferentiated or poorly differentiated tumor cells. |
| G2 (Moderately differentiated) |
Moderately Differentiated |
C14162 |
NCI Thesaurus |
Describes tumor cells that have lost some of the appearance of normal cells. They tend to grow and spread at a faster rate than well differentiated tumor cells. |
| G3 (Poorly differentiated) |
Poorly Differentiated |
C14167 |
NCI Thesaurus |
Describes tumor cells that generally have lost most of the appearance of normal cells. They tend to grow and spread. |
| G4 (Undifferentiated/anaplastic) |
Undifferentiated |
C14176 |
NCI Thesaurus |
A term used to describe cells or tissues that do not have specialized ("mature") structures or functions. Undifferentiated cancer cells often grow and spread quickly. |
| GX (Grade cannot be assessed) |
Grade X |
C113730 |
NCI Thesaurus |
A morphologic qualifier indicating that the grade of a neoplasm cannot be assessed. |
| Not applicable |
Not Applicable |
C48660 |
NCI Thesaurus |
Determination of a value is not relevant in the current context. |
| Not specified |
Not specified |
C38046 |
NCI Thesaurus |
Not stated explicitly or in detail. |