"Medullary thyroid cancer staging refers to TNM staging of medullary thyroid carcinomas. Papillary, follicular, and anaplastic thyroid carcinomas have similar TNM category definitions but different prognostic stage group definitions. The following article reflects the 8th version published by the American Joint Committee on Cancer, which is used for staging starting January 1, 2018 1,2."
"Medullary thyroid cancer staging refers to TNM staging of medullary thyroid carcinomas. Papillary, follicular, and anaplastic thyroid carcinomas have similar TNM category definitions but different prognostic stage group definitions. The following article reflects the 8th version published by the American Joint Committee on Cancer, which is used for staging starting January 1, 2018 1,2."
"Medullary thyroid cancer staging refers to TNM staging of medullary thyroid carcinomas. Papillary, follicular, and anaplastic thyroid carcinomas have similar TNM category definitions but different prognostic stage group definitions. The following article reflects the 8th version published by the American Joint Committee on Cancer, which is used for staging starting January 1, 2018 1,2."
"TX: primary tumour cannot be assessed"
"NX: regional lymph nodes cannot be assessed"
"The terms pM0 and MX are not valid TNM categories. The following categories may be used:"
"Primary tumour (T)"
"Regional lymph node (N)"
"Distant metastases (M)"
"T1a: tumour ≤1 cm, limited to the thyroid"
"T1b: tumour >1 cm but ≤2 cm, limited to the thyroid"
"T3a: tumour >4 cm, limited to the thyroid"
"T3b: gross extrathyroidal extension invading only strap muscles (sternohyoid, sternothyroid, thyrohyoid, or omohyoid muscles)"
"T4a: tumour invading subcutaneous soft tissues, larynx, trachea, oesophagus, or recurrent laryngeal nerve"
"T4b: tumour extending toward the spine, invading prevertebral fascia, into nearby blood vessels, or encasing carotid artery or mediastinal vessels"
"N0a: one or more lymph nodes confirmed benign by cytology/histology"
"N0b: no radiologic or clinical evidence of regional lymph node metastasis"
"T4a, [Any N], M0"
"T4b, [Any N], M0"
Expected headings
"Primary tumour (T)"
"Regional lymph node (N)"
"Distant metastases (M)"
"Stage groups"
"Changes since prior versions"
"N1a: central lymph node metastases to level VI (pretracheal, paratracheal, and prelaryngeal/Delphian lymph nodes) or level VII (upper mediastinal); can be unilateral or bilateral"
"N1b: lateral neck lymph node metastases (levels I, II, III, IV, or V, or retropharyngeal); can be unilateral, bilateral, or contralateral"
"N1b: lateral neck lymph node metastases (levels I, II, III, IV, or V, or retropharyngeal); can be unilateral, bilateral, or contralateral"