Difference between revisions of "Thyroid cancer staging"
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Line 27: | Line 27: | ||
| >4 cm | | >4 cm | ||
| limited to thyroid | | limited to thyroid | ||
| | |||
|- | |- | ||
|pT3b | |pT3b | ||
| extension into strap muscles | | extension into strap muscles | ||
| strap muscles include: sternothyroid m., sternothyroid, thyrohyoid, omohyoid | | strap muscles include: sternothyroid m., sternothyroid, thyrohyoid, omohyoid | ||
| | |||
|- | |- | ||
|pT4a | |pT4a |
Revision as of 13:24, 7 June 2022
Thyroid cancer staging is done with the TNM staging system.
TNM staging system
Tumour stage not including anaplastic carcinoma
T stage | Size/criteria | Other requirements | Comment |
---|---|---|---|
pT1a | 1 cm or less | limited to thyroid | very common |
pT1b | >1 cm and <=2 cm | limited to thyroid | |
pT2 | >2 cm and <=4 cm | limited to thyroid | |
pT3a | >4 cm | limited to thyroid | |
pT3b | extension into strap muscles | strap muscles include: sternothyroid m., sternothyroid, thyrohyoid, omohyoid | |
pT4a | any size | any of the following: subcutaneous tissue, trachea, esophagus, larynx, recurrent laryngeal nerve | |
pT4b | any size | any of the following: mediastinal vessels, encasing carotid artery, prevertebral fascia |
Lymph nodes
N stage | Criteria | Comment |
---|---|---|
pN0 | negative for lymph node metastasis | |
pN1a | metastasis to level VI or VII | level VI = pretracheal, paratracheal, prelaryngeal/Delphian, perithyroidal; VII = mediastinal lymph nodes |
pN1b | metastasis to level I, II, III, IV, V, or retropharyngeal |
Note:
- Level VI = central neck dissection.