OROPHARYNX, VALLECULA (67100)    ICDO TOPOGRAPHY (164)

Primary Tumor (T)
T4  Tumor invades adjacent structures (e.g.,
      pterygoid muscle(s), mandible, hard palate,
      deep muscle of tongue, larynx)
     
TX  Primary tumor cannot be assessed
T0  No evidence of primary tumor
Tis Carcinoma 'in situ'
T1  Tumor 2 cm or less in greatest dimension
T2  Tumor more than 2 cm but not more than
      4 cm in greatest dimension
T3  Tumor more than 4 cm in greatest dimension

Regional Lymph Nodes (N)
      greatest dimension
N2b Metastasis in multiple ipsilateral lymph nodes,
      none more than 6 cm in greatest dimension
N2c Metastasis in bilateral or contralateral lymph
      nodes, none more than 6 cm in greatest dimension
N3  Metastasis in a lymph node more than 6 cm in
      greatest dimension

NX  Regional lymph nodes cannot be assessed
N0  No regional lymph node metastasis
N1  Metastasis in a single ipsilateral lymph node,
      3 cm or less in greatest dimension
N2  Choose from N2a, N2b or N2c
N2a Metastasis in a single ipsilateral lymph node
      more than 3 cm but not more than 6 cm in

• DESCRIPTION:   CBA
  CODE:   TX
• DESCRIPTION:   NET
  CODE:   T0
• DESCRIPTION:   CIS
  CODE:   Tis
• DESCRIPTION:   Tumor 2 cm or less
  CODE:   T1
• DESCRIPTION:   Tumor > 2 cm but not > 4 cm
  CODE:   T2
• DESCRIPTION:   Tumor > 4 cm
  CODE:   T3
• DESCRIPTION:   Invades larynx, tongue, medial pterygoid, palate
  CODE:   T4a
• DESCRIPTION:   Invades lateral pterygoid/nasopharynx, skull base
  CODE:   T4b
• DESCRIPTION:   NA
  CODE:   NA

Primary Tumor (T)
T4a Tumor invades the larynx, deep/extrinsic
      muscle of tongue, medial pterygoid hard palate, or
      mandible
T4b Tumor invades the lateral pterygoid muscle,
      pterygoid plates, lateral nasopharynx, or skull
      base or encases carotid artery
     
TX  Primary tumor cannot be assessed
T0  No evidence of primary tumor
Tis Carcinoma 'in situ'
T1  Tumor 2 cm or less in greatest dimension
T2  Tumor more than 2 cm but not more than
      4 cm in greatest dimension
T3  Tumor more than 4 cm in greatest dimension

Regional Lymph Nodes (N)
      greatest dimension
N2b Metastasis in multiple ipsilateral lymph nodes,
      none more than 6 cm in greatest dimension
N2c Metastasis in bilateral or contralateral lymph
      nodes, none more than 6 cm in greatest dimension
N3  Metastasis in a lymph node more than 6 cm in
      greatest dimension

NX  Regional lymph nodes cannot be assessed
N0  No regional lymph node metastasis
N1  Metastasis in a single ipsilateral lymph node,
      3 cm or less in greatest dimension
N2  Choose from N2a, N2b or N2c
N2a Metastasis in a single ipsilateral lymph node
      more than 3 cm but not more than 6 cm in

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

Primary Tumor (T)
T4a  Moderately advanced local disease.
     Tumor invades the larynx, extrinsic muscle of tongue, medial
      pterygoid, hard palate, or mandible
T4b  Very advanced local disease.
     Tumor invades lateral pterygoid muscle, pterygoid plates, lateral  
      nasopharynx, or skull base or encases carotid artery
 
TX   Primary tumor cannot be assessed
T0   No evidence of primary tumor
Tis  Carcinoma in situ
T1   Tumor 2 cm or less in greatest dimension
T2   Tumor more than 2 cm but not more than 4 cm in greatest dimension
T3   Tumor more than 4 cm in greatest dimension or extension to lingual 
      surface of epiglottis

• N-CODE:   X
• N-CODE:   2A
• N-CODE:   2B
• N-CODE:   2C

Regional Lymph Nodes (N)
      bilateral or contralateral lymph nodes, none more than 6 cm in
      greatest dimension
N2a  Metastasis in a single ipsilateral lymph node more than 3 cm but not
      more than 6 cm in greatest dimension
N2b  Metastasis in multiple ipsilateral lymph nodes, none more than 6 cm
      in greatest dimension
N2c  Metastasis in bilateral or contralateral lymph nodes, none more than
      6 cm in greatest dimension
N3   Metastasis in a lymph node more than 6 cm in greatest dimension
 
NX   Regional lymph nodes cannot be assessed
N0   No regional lymph node metastasis
N1   Metastasis in a single ipsilateral lymph node, 3 cm or less in
      greatest dimension
N2   Metastasis in a single ipsilateral lymph node, more than 3 cm but not
      more than 6 cm in greatest dimension, or in multiple ipsilateral
      lymph nodes, none more than 6 cm in greatest dimension, or in

• PHARYNX
• VALLECULA

• CBA
  CODE:   TX
  ACOS CODE:   TX
• NET
  CODE:   T0
  ACOS CODE:   T0
• Carcinoma 'in situ'
  CODE:   Tis
  ACOS CODE:   TIS
• 2 cm or less
  CODE:   T1
  ACOS CODE:   T1
• > 2 but not > 4 cm
  CODE:   T2
  ACOS CODE:   T2
• > 4 cm
  CODE:   T3
  ACOS CODE:   T3
• TIAS
  CODE:   T4
  ACOS CODE:   T4
• NA
  CODE:   NA
  ACOS CODE:   NA

• Regional lymph nodes cannot be assessed
  CODE:   NX
  ACOS CODE:   NX
• No regional lymph node metastasis
  CODE:   N0
  ACOS CODE:   N0
• 1 ipsilateral, 3 cm or less
  CODE:   N1
  ACOS CODE:   N1
• N2a, N2b or N2c
  CODE:   N2
  ACOS CODE:   N2
• 1 ipsilateral, > 3 but not > 6 cm
  CODE:   N2a
  ACOS CODE:   N2A
• Multiple ipsilateral, none > 6 cm
  CODE:   N2b
  ACOS CODE:   N2B
• Bilateral/contralateral, none > 6 cm
  CODE:   N2c
  ACOS CODE:   N2C
• > 6 cm
  CODE:   N3
  ACOS CODE:   N3
• NA
  CODE:   NA
  ACOS CODE:   NA