Collaborative Stage for TNM 7 - Revised 10/27/2009 [ Schema ]
Thyroid
Histology Grade Extension AJCC Table
- Note: For Extension codes 100 - 550 ONLY, where histology equals 8020, 8021, 8030, 8031, or 8032, or grade equals 4, the T category is assigned based on the value of CS Extension as shown here.
| CS Extension | TNM Map |
| 100 | T4a |
| 200 | T4a |
| 300 | T4a |
| 400 | T4a |
| 405 | ERROR |
| 410 | ERROR |
| 415 | ERROR |
| 420 | ERROR |
| 450 | T4b |
| 480 | T4b |
| 490 | ERROR |
| 500 | T4b |
| 520 | T4b |
| 550 | T4b |