Collaborative Stage for TNM 7 - Revised 10/14/2009 [ Schema ]
| Code | Description |
| 000 | No evidence of primary tumor [CS Extension code = 950] Primary tumor in ectopic thyroid tissue |
| 001 | Solitary tumor |
| 002 | Multifocal tumor [AJCC descriptor (m)] |
| 999 | Insufficient information Not documented in patient record |