THYROID GLAND (67739)    ICDO TOPOGRAPHY (164)

Primary Tumor (T)
      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
     
Note: All categories may be subdivided:
(a) solitary tumor, (b) multifocal tumor
(the largest determines the classification)

TX  Primary tumor cannot be assessed
T0  No evidence of primary tumor
T1  Tumor 1 cm or less in greatest dimension

• None
  CODE:   0
• Endoscopy, NOS
  CODE:   1
• Endoscopy, not image guided
  CODE:   2
• Endoscopy, image guided
  CODE:   3
• Open, NOS
  CODE:   4
• Open, not assisted by endoscopy
  CODE:   5
• Open, assisted by endoscopy
  CODE:   6
• Unknown; not stated; death certificate ONLY
  CODE:   9

Regional Lymph Nodes (N)
N1b Metastasis in bilateral, midline, or contralateral
           cervical or mediastinal lymph node(s)

Regional lymph nodes are the cervical
and upper mediastinal lymph nodes.

NX  Regional lymph nodes cannot be assessed
N0  No regional lymph node metastasis
N1  Regional lymph node metastasis
N1a Metastasis in ipsilateral cervical lymph node(s)

• None; no surgery of primary site; autopsy ONLY
  CODE:   0
  SPS A-CODES:   A000
  SPS B-CODES:   B000
• Subtotal or near total thyroidectomy
  CODE:   40
  SPS A-CODES:   A400
  SPS B-CODES:   B400
• Total thyroidectomy
  CODE:   50
  SPS A-CODES:   A500
  SPS B-CODES:   B500
• Thyroidectomy, NOS
  CODE:   80
  SPS A-CODES:   A800
  SPS B-CODES:   B800
• Surgery, NOS
  CODE:   90
  SPS A-CODES:   A900
  SPS B-CODES:   B900
• Unknown if surgery performed; death certificate ONLY
  CODE:   99
  SPS A-CODES:   A990
  SPS B-CODES:   B990
• Local tumor destruction, NOS
  CODE:   13
  SPS A-CODES:   A130
  SPS B-CODES:   B130
• Removal of less than a lobe, NOS
  CODE:   25
  SPS A-CODES:   A250
  SPS B-CODES:   B200
• Local surgical excision
  CODE:   26
  SPS A-CODES:   A260
  SPS B-CODES:   B210
• Removal of a partial lobe ONLY
  CODE:   27
  SPS A-CODES:   A270
  SPS B-CODES:   B220
• Removal of less than a lobe, NOS (ROADS)
  CODE:   10
• Removal of less than a lobe, local surgical excision (ROADS)
  CODE:   11
• Removal of a partial lobe ONLY (ROADS)
  CODE:   12
• Lobectomy and/or isthmectomy, NOS
  CODE:   20
  SPS A-CODES:   A200
  SPS B-CODES:   B250
• Lobectomy ONLY (right or left)
  CODE:   21
  SPS A-CODES:   A210
  SPS B-CODES:   B251
• Isthmectomy ONLY
  CODE:   22
  SPS A-CODES:   A220
  SPS B-CODES:   B252
• Lobectomy WITH isthmus
  CODE:   23
  SPS A-CODES:   A230
  SPS B-CODES:   B253
• Removal of a lobe and partial removal of contralateral lobe
  CODE:   30
  SPS A-CODES:   A300
  SPS B-CODES:   B300

• All margins grossly and microscopically negative
  CODE:   0
• Margins involved, NOS
  CODE:   1
• Microscopic involvement
  CODE:   2
• Macroscopic involvement
  CODE:   5
• Margins not evaluable
  CODE:   7
• No surgery of primary site
  CODE:   8
• Unk whether margins involved or negative; death cert ONLY
  CODE:   9

• No regional lymph nodes removed
  CODE:   0
• Regional lymph node(s) removed, NOS
  CODE:   1
• Neck dissection, NOS
  CODE:   2
• Neck dissection, selective, limited; nodal sampling
  CODE:   3
• Neck dissection, modified/modified radical
  CODE:   4
• Neck dissection, radical
  CODE:   5
• Unknown; not stated; death certificate ONLY
  CODE:   9

• None
  CODE:   0
• Surg to other sites/nodes, NOS; unk if regional or distant
  CODE:   1
• Other regional site(s)
  CODE:   2
• Distant lymph node(s)
  CODE:   3
• Distant site(s)
  CODE:   4
• Combination of 4 WITH 2 or 3
  CODE:   5
• Unknown; not stated; death certificate ONLY
  CODE:   9

• NA
  CODE:   9

• Not a breast or prostate primary
  CODE:   0

• Not a breast or prostate primary
  CODE:   0

• DESCRIPTION:   CBA
  CODE:   TX
• DESCRIPTION:   NET
  CODE:   T0
• DESCRIPTION:   2 cm or less limited to thyroid
  CODE:   T1
• DESCRIPTION:   > 2 cm, but not > 4 cm, limited to thyroid
  CODE:   T2
• DESCRIPTION:   > 4 cm limited to thyroid or mininal extrathyroid ext
  CODE:   T3
• DESCRIPTION:   Any size beyond thyroid capsule
  CODE:   T4a
• DESCRIPTION:   Prevertebral fascia/carotid artery
  CODE:   T4b
• DESCRIPTION:   NA
  CODE:   NA

Primary Tumor (T)
      extrathyroid extension (eg, extension to
      sternothyroid muscle or perithyroid soft tissues)
T4a Tumor of any size extending beyond the thyroid capsule
      to invade subcutaneous soft tissues, larynx, trachea,
      esophagus, or recurrent laryngeal nerve
T4b Tumor invades prevertebral fascia or
      encases carotid artery or mediastinal vessels

All anaplastic carcinomas are considered T4 tumors.

     
T4a Intrathyroidal anaplastic carcinoma - surgically resectable
T4b Extrathyroidal anaplastic carcinoma - surgically unresectable 
TX  Primary tumor cannot be assessed
T0  No evidence of primary tumor
T1  Tumor 2 cm or less in greatest dimension limited to the thyroid
T2  Tumor more than 2 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 or any tumor with minimal

• DESCRIPTION:   NCA
  CODE:   NX
• DESCRIPTION:   NRN
  CODE:   N0
• DESCRIPTION:   Regional lymph node metastasis
  CODE:   N1
• DESCRIPTION:   Metastasis to Level VI
  CODE:   N1a
• DESCRIPTION:   Metastasis to uni/bi/contra-lateral lymph nodes
  CODE:   N1b
• DESCRIPTION:   NA
  CODE:   NA

Regional Lymph Nodes (N)
N1a Metastasis to Level VI (pretracheal,
      paratracheal, and prelaryngeal/Delphian lymph
      nodes)
N1b Metastasis to unilateral, bilateral, or
      contralateral cervical or superior mediastinal
      lymph nodes

Regional lymph nodes are the central
compartment, lateral cervical, and upper
mediastinal lymph nodes.

NX  Regional lymph nodes cannot be assessed
N0  No regional lymph node metastasis
N1  Regional lymph node metastasis

• T-CODE:   X
• T-CODE:   1A
• T-CODE:   1B
• T-CODE:   4A
• T-CODE:   4B

Primary Tumor (T)
       limited to the thyroid
T3   Tumor more than 4 cm in greatest dimension limited to the thyroid, or
       any tumor with minimal extrathyroid extension (e.g., extension to
       sternothyroid muscle or perithyroid soft tissues)
T4a  Moderately advanced disease.
       Tumor of any size extending beyond the thyroid capsule to invade
       subcutaneous soft tissues, larynx, trachea, esophagus, or recurrent
       laryngeal nerve
     Intrathyroidal anaplastic carcinoma
T4b  Very advanced disease.
 
       Tumor invades prevertebral fascia or encases carotid artery or
       mediastinal vessels
     Anaplastic carcinoma with gross extrathyroid extension
TX   Primary tumor cannot be assessed
T0   No evidence of primary tumor
T1   Tumor 2 cm or less in greatest dimension limited to the thyroid
T1a  Tumor 1 cm or less, limited to the thyroid
T1b  Tumor more than 1 cm but not more than 2 cm in greatest dimension, 
       limited to the thyroid
T2   Tumor more than 2 cm but not more than 4 cm in greatest dimension, 

• N-CODE:   X
• N-CODE:   1A
• N-CODE:   1B

Regional Lymph Nodes (N)
       mediastinal lymph nodes (Level VII)
 
NX   Regional lymph nodes cannot be assessed.
N0   No regional lymph node metastasis
N1   Regional lymph node metastasis
N1a  Metastasis to Level VI (pretracheal, paratracheal, and 
       prelaryngeal/Delphian lymph nodes)
N1b  Metastasis to unilateral, bilateral, or contralateral cervical
       (Levels I, II, III, IV or V) or retropharyngeal or superior

• THYROID, NOS
• THYROGLOSSAL DUCT

• CBA
  CODE:   TX
  ACOS CODE:   TX
• > 4 cm, solitary
  CODE:   T3a
  ACOS CODE:   T3A
• > 4 cm, multifocal
  CODE:   T3b
  ACOS CODE:   T3B
• Any size beyond thyroid
  CODE:   T4
  ACOS CODE:   T4
• Any size beyond thyroid, solitary
  CODE:   T4a
  ACOS CODE:   T4A
• Any size beyond thyroid, multifocal
  CODE:   T4b
  ACOS CODE:   T4B
• NA
  CODE:   NA
  ACOS CODE:   NA
• NET
  CODE:   T0
  ACOS CODE:   T0
• 1 cm or less
  CODE:   T1
  ACOS CODE:   T1
• 1 cm or less, solitary
  CODE:   T1a
  ACOS CODE:   T1A
• 1 cm or less, multifocal
  CODE:   T1b
  ACOS CODE:   T1B
• > 1 but not > 4 cm
  CODE:   T2
  ACOS CODE:   T2
• > 1 but not > 4 cm, solitary
  CODE:   T2a
  ACOS CODE:   T2A
• > 1 but not > 4 cm, multifocal
  CODE:   T2b
  ACOS CODE:   T2B
• > 4 cm
  CODE:   T3
  ACOS CODE:   T3

• NCA
  CODE:   NX
  ACOS CODE:   NX
• NRN
  CODE:   N0
  ACOS CODE:   N0
• Regional lymph node metastasis
  CODE:   N1
  ACOS CODE:   N1
• Ipsilateral cervical lymph node(s)
  CODE:   N1a
  ACOS CODE:   N1A
• Bilateral, midline/contralateral cervical
  CODE:   N1b
  ACOS CODE:   N1B
• NA
  CODE:   NA
  ACOS CODE:   NA