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Thyroid gland (ICD10 C73.9)

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This is the data sheet for TNM 9th edition staging of the thyroid gland  (ICD10 C73.9).

For more detailed information regarding TNM staging, please see pages 53-56 of the UICC TNM 9 book.

Stage groupings

Papillary and Follicular under 55 years

Stage Group

T stage

N stage

M stage

Stage I

Any T

Any N

M0

Stage II

Any T

Any N

M1

Papillary or Follicular 55 years and older

Stage I

T1a,T1b,T2

N0

M0

Stage II

T3

N0

M0

T1,T2,T3

N1

M0

Stage III

T4a

Any N

M0

Stage IVA

T4b

Any N

M0

Stage IVB

Any T

Any N

M1

Medullary carcinoma

Stage I

T1a, T1b

N0

M0

Stage II

T2, T3

N0

M0

Stage III

T1, T2, T3

N1a

M0

Stage IVA

T1, T2, T3

N1b

M0

 

T4a

Any N

M0

Stage IVB

T4b

Any N

M0

Stage IVC

Any T

Any N

M1

Anaplastic

Stage IVA

T1,T2,T3a

N0

M0

Stage IVB

T1,T2,T3a

N1

M0

Stage IVB

T3b,T4a,T4b

N0,N1

M0

Stage IVC

Any T

Any N

M1

TNM clinical classification

T - primary tumour*

T value

Description

cTX

Primary tumour cannot be assessed

cT0

No evidence of primary tumour

cT1

Tumour 2 cm or less in greatest dimension, limited to the thyroid

cT1a - Tumour 1 cm or less in greatest dimension, limited to the thyroid

cT1b - Tumour more than 1 cm but not more than 2 cm in greatest dimension, limited to the thyroid

cT2

Tumour more than 2 cm but not more than 4 cm in greatest dimension, limited to the thyroid

cT3

Tumour more than 4 cm in greatest dimension, limited to the thyroid or with gross extrathyroidal extension invading only strap muscles (sternohyoid, sternothyroid, or omohyoid muscles) or parathyroid gland

cT3a - Tumour more than 4 cm in greatest dimension, limited to the thyroid

cT3b - Tumour of any size with gross extrathyroidal extension invading strap muscles (sternohyoid, sternothyroid, or omohyoid muscles) or parathyroid gland

cT4a

Tumour extends beyond the thyroid capsule and invades any of the following: subcutaneous soft tissues, larynx, trachea, oesophagus, recurrent laryngeal nerve or the sternocleidomastoid muscle

cT4b

Tumour invades prevertebral fascia, mediastinal vessels, or encases carotid artery

Note:

*Including papillary, follicular, poorly differentiated, Hurthle cell and anaplastic carcinomas

N - regional lymph nodes

N value

Description

cNX

Regional lymph nodes cannot be assessed

cN0

No regional lymph node metastasis

cN1

Regional lymph node metastasis

cN1a - Metastasis in Level VI (pretracheal, paratracheal, and prelaryngeal/Delphian lymph nodes) or upper/superior mediastinum

cN1b - Metastasis in other unilateral, bilateral or contralateral cervical (Levels I, II III, IV, or V) or retropharyngeal

M - distant metastasis

M value

Description

cM0

No distant metastasis

cM1

Distant Metastasis

TNM pathological classification

pT - primary tumour

The pT and pN categories correspond to the cT and cN categories.

pN value

Description

pN0

Histological examination of a selective neck dissection specimen should ordinarily include six or more lymph nodes. If the lymph nodes are negative, but the number ordinarily examined is not met, classify as pN0.

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Last edited: 16 January 2026 4:00 pm

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Sarcoma of orbit

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Adrenal cortex
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  4. Pharynx (ICD10 C01, C02.4, C05.1-2, C09, C10.0, C10.2-3, C10.9, C11-13)
  5. Salivary glands (ICD10 C00-C14, C15.0, C30-C33, C41.1)
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  7. Gastrointestinal stromal tumours (ICD10 C15-C20, C48.1-2)
  8. Stomach (ICD10 C16 - excluding C16.0)
  9. Small intestine (ICD10 C17)
  10. Appendix (ICD10 C18.1)
  11. Colon and rectum (ICD10 C18-C20)
  12. Anal and perianal skin (ICD10 C21)
  13. Liver (ICD10 C22.0)
  14. Intrahepatic bile ducts (ICD10 C22.1)
  15. Gallbladder (ICD10 C23)
  16. Distal extrahepatic bile duct (ICD10 C24.0)
  17. Perihilar bile ducts (ICD10 C24.0)
  18. Ampulla of vater (ICD10 C24.1)
  19. Pancreas (ICD10 C25)
  20. Nasal cavity and paranasal sinuses (ICD10 C30.0, C31.0, C31.1)
  21. Larynx (ICD10 C32.0, C32.1, C32.2, C10.1)
  22. Lung (ICD10 C34)
  23. Thymus tumours (ICD10 C37.9)
  24. Soft tissues (ICD10 C15-C26, C34-C37 C38.1-3, C47-C49, C51-C53, C58, C60-C68)
  25. Bone (ICD10 C40, C41)
  26. Melanoma of skin (ICD10 C00.0-2, C00.6, C21.2, C43, C51, C60, C63.2)
  27. Merkel cell carcinoma of skin (ICD10 C00, C44, C51, C60, 63.2, C80)
  28. Skin carcinoma of the head and neck (ICD10 C00.0-2, C00.6, C44.0, C44.2-4)
  29. Carcinoma of skin of the eyelid (ICD10 C44.1)
  30. Carcinoma of skin (excluding eyelid, head and neck, perianal, vulva and penis) (ICD10 C44.5-7, C63.2)
  31. Pleural mesothelioma (ICD10 C38.4)
  32. Breast tumours (ICD10 C50)
  33. Vulva (ICD10 C51)
  34. Cervix uteri (ICD10 C53)
  35. Uterine sarcomas
  36. Uterus - endometrium (ICD10 C54.1, C55)
  37. Ovarian, fallopian tube and primary peritoneal carcinoma (ICD10 C56, C57, C48.1, C48.2)
  38. Gestational trophoblastic neoplasms (ICD10 C58)
  39. Penis tumours (ICD10 C60)
  40. Prostate tumours (ICD10 C61.9)
  41. Testis tumours (ICD10 C62)
  42. Kidney tumours (ICD10 C64)
  43. Renal pelvis and ureter tumours (ICD10 C65 & C66)
  44. Urinary bladder tumours (ICD10 C67)
  45. Urethra tumours (ICD10 C68.0, C61.9)
  46. Carcinoma of conjuctiva (ICD10 C69.0)
  47. Melanoma of conjuctiva (ICD10 C69.0)
  48. Retinoblastoma (ICD10 C69.2)
  49. Melanoma of uvea (ICD10 C69.3-4)
  50. Carcinoma of lacrimal gland (ICD10 C69.5)
  51. Sarcoma of orbit (ICD10 C69.6)
  52. Thyroid gland (ICD10 C73.9)
  53. Adrenal cortex (ICD10 C74.0)
  54. Adrenal medulla and extra-adrenal paraganglia (ICD10 C74.1 C75.5)
  55. Parathyroid gland (ICD10 C75.0)
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  61. Hepatoblastoma (CTYA)
  62. Hodgkins and non-hodgkins lymphoma (ICD10 C81-88)
  63. Medulloblastoma
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