SEER Training Modules
11/27/12 - The NCI is working on updating materials.
Head & Neck Staging: Table Five
Salivary Glands (C07, C08)
| TNM Classification |
Histological/Clinical Features |
| T1 |
2 cm or less without extraparenchymal extension |
| T2 |
>2cm but <4cm without extraparenchymal extension |
| T3 |
>4cm and/or extraparenchymal extension |
| T4a |
Invades skin, mandible, ear canal, and/or facial nerve |
| T4b |
Invades skull base and/or pterygoid plates and/or encases carotid artery |
Thyroid Gland (C73)
| TNM Classification |
Histological/Clinical Features |
| T1 |
2cm or less limited to thyroid |
| T2 |
>2cm but <4cm limited to thyroid |
| T3 |
>4cm limited to thyroid or any tumor with minimal extrathyroid extension |
| T4a |
Extending beyond thyroid capsule to invade subcutaneous soft tissue, larynx, trachea, esophagus or recurrent laryngeal nerve |
| T4b |
Invades prevertebral fascia or encases carotid artery or mediastinal vessels |
