Thyroid: Anaplastic(Pathological) - TNM Calc
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Primary Tumor (T)
Regional Lymph Nodes (N)
Distant Metastasis (M)
R e s u l t s
Stage
 
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Thyroid: Anaplastic(Pathological) - TNM Calc

This view displays the TNM formula.Please select appropriate value from the list for T/N/M/G variables. The result will be displayed, based on your selection of variables.

Pathological T (pT)

pT Category pT Criteria
pTX Primary tumor cannot be assessed
pT0 No evidence of primary tumor
pT1 Tumor less than or equal to 2 cm in greatest dimension limited to the thyroid
pT1a Tumor less than or equal to 1 cm in greatest dimension limited to the thyroid
pT1b Tumor greater than 1 cm but less than or equal to 2 cm in greatest dimension limited to the thyroid
pT2 Tumor greater than 2 cm but less than or equal to 4 cm in greatest dimension limited to the thyroid
pT3 Tumor greater than 4 cm limited to the thyroid, or gross extrathyroidal extension invading only strap muscles
pT3a Tumor greater than 4 cm limited to the thyroid
pT3b Gross extrathyroidal extension invading only strap muscles (sternohyoid, sternothyroid, thyrohyoid, or omohyoid muscles) from a tumor of any size
pT4 Includes gross extrathyroidal extension beyond the strap muscles
pT4a Gross extrathyroidal extension invading subcutaneous soft tissues, larynx, trachea, esophagus, or recurrent laryngeal nerve from a tumor of any size
pT4b Gross extrathyroidal extension invading prevertebral fascia or encasing the carotid artery or mediastinal vessels from a tumor of any size
cTX Primary tumor cannot be assessed
cT0 No evidence of primary tumor
cT1 Tumor less than or equal to 2 cm in greatest dimension limited to the thyroid
cT1a Tumor less than or equal to 1 cm in greatest dimension limited to the thyroid
cT1b Tumor greater than 1 cm but less than or equal to 2 cm in greatest dimension limited to the thyroid
cT2 Tumor greater than 2 cm but less than or equal to 4 cm in greatest dimension limited to the thyroid
cT3 Tumor greater than 4 cm limited to the thyroid, or gross extrathyroidal extension invading only strap muscles
cT3a Tumor greater than 4 cm limited to the thyroid
cT3b Gross extrathyroidal extension invading only strap muscles (sternohyoid, sternothyroid, thyrohyoid, or omohyoid muscles) from a tumor of any size
cT4 Includes gross extrathyroidal extension beyond the strap muscles
cT4a Gross extrathyroidal extension invading subcutaneous soft tissues, larynx, trachea, esophagus, or recurrent laryngeal nerve from a tumor of any size
cT4b Gross extrathyroidal extension invading prevertebral fascia or encasing the carotid artery or mediastinal vessels from a tumor of any size
Pathological N (pN)
pN Category pN Criteria
pNX Regional lymph nodes cannot be assessed
pN0 No evidence of locoregional lymph node metastasis
pN0a One or more cytologically or histologically confirmed benign lymph nodes
pN1 Metastasis to regional nodes
pN1a Metastasis to level VI or VII (pretracheal, paratracheal, or prelaryngeal/Delphian, or upper mediastinal) lymph nodes. This can be unilateral or bilateral disease.
pN1b Metastasis to unilateral, bilateral, or contralateral lateral neck lymph nodes (levels I, II, III, IV, or V) or retropharyngeal lymph nodes
cNX Regional lymph nodes cannot be assessed
cN0 No evidence of locoregional lymph node metastasis
cN0a One or more cytologically or histologically confirmed benign lymph nodes
cN0b No radiologic or clinical evidence of locoregional lymph node metastasis
cN1 Metastasis to regional nodes
cN1a Metastasis to level VI or VII (pretracheal, paratracheal, or prelaryngeal/Delphian, or upper mediastinal) lymph nodes. This can be unilateral or bilateral disease.
cN1b Metastasis to unilateral, bilateral, or contralateral lateral neck lymph nodes (levels I, II, III, IV, or V) or retropharyngeal lymph nodes

Definition of Distant Metastasis (M)- Pathological M (pN)

pM Category pM Criteria
cM0 No distant metastasis
cM1 Distant metastasis
pM1 Microscopic evidence of distant metastasis