TNM Classification : Thyroid carcinoma

 

T- Primary tumor

TX - Primary tumor cannot be assessed

TO - No evidence of primary tumor

T1 - Tumor 1 cm or less in greatest dimension, limited to the thyroid

T2 - Tumor more than 1 cm but not more than 4 cm in greatest dimension, limited to the thyroid

T3 - Tumor more than 4 cm in greatest dimension, limited to the thyroid

T4 - Tumor of any size extending beyond the thyroid capsule

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N - Regional lymph nodes

NX - Regional lymph nodes cannot be assessed

NO - No regional lymph node metastasis

N1 - Regional lymph node metastasis

N1a - Metastasis in ipsilateral cervical lymph nodes

N1b - Metastasis in bilateral, midline, or contralateral cervical or mediastinal lymph nodes

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M - Distant metastasis

MX - Distant metastasis cannot be assessed

MO - No distant metastasis

M1 - Distant metastasis

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Histopathologic Types

- Papillary carcinoma

- Follicular carcinoma

- Medullary carcinoma

- Undifferentiated (anaplastic) carcinoma