EOD Primary Tumor
This input is used for staging
Notes
**Note:** Extrathyroidal extension includes minor (microscopic) extension through the thyroid capsule which is identified only on microscopic examination (see code 200) to gross (macroscopic) extrathyroidal extension, which is documented in the operative report and involves major structures (see codes 300, 400, 600, and 700). * If the only information available is "extrathyroidal extension" and cannot determine whether it is microscopic or gross, code 200. * If the only information is "gross extrathyroidal extension" and the involvement of major structures cannot be determined, code 750.Default
999NAACCR Item
NAACCR #772| Code | Description | SS2018 T |
|---|---|---|
| 000 | In situ, intraepithelial, noninvasive | IS |
| 100 | Single invasive tumor confined/limited to thyroid Multiple foci confined/limited to thyroid Into thyroid capsule, but not beyond Confined/limited to thyroid, NOS Localized, NOS | L |
| 200 | Microscopic extrathyroidal extension Extrathyroidal extension, NOS | RE |
| 300 | Gross extrathyroidal extension invading - Pericapsular soft tissue/connective tissue - Strap muscle(s) + Omohyoid + Sternohyoid + Sternothyroid + Thyrohyoid | RE |
| 400 | Gross extrathyroidal extension invading - Cricoid cartilage - Esophagus - Larynx - Parathyroid - Recurrent laryngeal nerve - Sternocleidomastoid muscle - Subcutaneous soft tissues - Trachea - Vagus nerve | RE |
| 600 | Gross extrathyroidal extension invading - Blood vessel(s) (major) + Carotid artery (encased) + Jugular vein + Thyroid artery or vein - Thyroid cartilage - Tumor described as "FIXED to adjacent tissues" | RE |
| 700 | Gross extrathyroidal extension invading - Bone - Mediastinal tissues - Prevertebral fascia - Skeletal muscle, other than strap or sternocleidomastoid muscle Further contiguous extension | D |
| 750 | Gross extrathyroidal extension, NOS | RE |
| 800 | No evidence of primary tumor | U |
| 999 | Unknown; extension not stated Primary tumor cannot be assessed Not documented in medical record Death Certificate Only | U |