Extension Size Category AJCC 7 Table
Notes
**Note**: For CS Extension codes 150-180, the T for AJCC 7 staging is assigned based on the values of tumor basal diameter, recorded in CS Site-Specific Factor 2, and thickness, recorded in CS Site-Specific Factor 3. Basal diameter and thickness are mapped to Tumor Size Categories in the Tumor Size Category AJCC 7 Table, and the CS Extension codes and Tumor Size Categories are mapped to T as shown in this table.| CS Extension | Tumor Size Category | T Category |
|---|---|---|
| 150 | 1 | T1a |
| 160 | 1 | T1b |
| 170 | 1 | T1c |
| 180 | 1 | T1d |
| 150 | 2 | T2a |
| 160 | 2 | T2b |
| 170 | 2 | T2c |
| 180 | 2 | T2d |
| 150 | 3 | T3a |
| 160 | 3 | T3b |
| 170 | 3 | T3c |
| 180 | 3 | T3d |
| 150 | 4 | T4a |
| 160 | 4 | T4b |
| 170 | 4 | T4c |
| 180 | 4 | T4d |
| 150, 160, 170, 180 | 9 | TX |
| CS Extension | Tumor Size Category | T Category |
|---|---|---|
| 150 | 1 | T1a |
| 160 | 1 | T1b |
| 170 | 1 | T1c |
| 180 | 1 | T1d |
| 150 | 2 | T2a |
| 160 | 2 | T2b |
| 170 | 2 | T2c |
| 180 | 2 | T2d |
| 150 | 3 | T3a |
| 160 | 3 | T3b |
| 170 | 3 | T3c |
| 180 | 3 | T3d |
| 150 | 4 | T4a |
| 160 | 4 | T4b |
| 170 | 4 | T4c |
| 180 | 4 | T4d |
| 150 | 9 | TX |
| 160 | 9 | TX |
| 170 | 9 | TX |
| 180 | 9 | TX |