Difference between revisions of "Thyroid cancer staging"

Revision as of 13:22, 7 June 2022

Thyroid cancer staging is done with the TNM staging system.

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
pT3	>4 cm and limited to thyroid (pT3a) or extension into strap muscles (e.g sternothyroid m., sternothyroid, thyrohyoid, omohyoid) (pT3b)
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

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:

@@ Line 25: / Line 25: @@
 |-
 |pT3
-| >4 cm and limited to thyroid ''or'' "minimal" extrathyroidal extension
+| >4 cm and limited to thyroid (pT3a) ''or'' extension into strap muscles (e.g sternothyroid m., sternothyroid, thyrohyoid, omohyoid) (pT3b)
-| "minimal" extrathyroidal extension = sternothyroid m. or perithyroidal tissue
 |
 |-
@@ Line 51: / Line 50: @@
 |-
 | pN1a
-| metastasis to level VI
+| metastasis to level VI or VII
-| level VI = pretracheal, paratracheal, prelaryngeal/Delphian, perithyroidal
+| level VI = pretracheal, paratracheal, prelaryngeal/Delphian, perithyroidal; VII = mediastinal lymph nodes
 |-
 | pN1b
-| metastasis to level I, II, III, IV, V, or retropharyngeal, mediastinal lymph nodes (VII)
+| metastasis to level I, II, III, IV, V, or retropharyngeal
 |
 |}