HYPOPHARYNX, POSTCRICOID (67130)    ICDO TOPOGRAPHY (164)

• CBA
  CODE:   TX
• NET
  CODE:   T0
• Carcinoma 'in situ'
  CODE:   Tis
• 1 subsite 2 cm or less
  CODE:   T1
• > 1 subsite/> 2 but not > 4 cm w/o fix of hemilarynx
  CODE:   T2
• > 4 cm/w fixation of hemilarynx
  CODE:   T3
• TIAS
  CODE:   T4
• NA
  CODE:   NA

Primary Tumor (T)
      than 2 cm but not more than 4 cm in greatest
      dimension without fixation of hemilarynx
T3  Tumor measures more than 4 cm in greatest dimension
      or with fixation of hemilarynx
T4  Tumor invades adjacent structures (e.g.,
      thyroid/cricoid cartilage, carotid artery,
      soft tissues of neck, prevertebral fascia/
      muscles, thyroid and/or esophagus
     
TX  Primary tumor cannot be assessed
T0  No evidence of primary tumor
Tis Carcinoma 'in situ'
T1  Tumor limited to one subsite of hypopharynx
      and 2 cm or less in greatest dimension
T2  Tumor involves more than one subsite of
      hypopharynx or an adjacent site, or measures more

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:   TIS
  CODE:   Tis
• DESCRIPTION:   1 subsite 2 cm or less
  CODE:   T1
• DESCRIPTION:   > 2 but not > 4 cm w/o fix of hemilarynx
  CODE:   T2
• DESCRIPTION:   > 4 cm/w fixation of hemilarynx
  CODE:   T3
• DESCRIPTION:   Thyroid/cricoid cartilage, etc
  CODE:   T4a
• DESCRIPTION:   Prevertebral fascia, carotid artery, etc
  CODE:   T4b
• DESCRIPTION:   NA
  CODE:   NA

Primary Tumor (T)
      than 2 cm but not more than 4 cm in greatest
      dimension without fixation of hemilarynx
T3  Tumor measures more than 4 cm in greatest dimension
      or with fixation of hemilarynx
T4a Tumor invades thyroid/cricoid cartilage,
      hyoid bone, thyroid gland, esophagus, or central
      compartment soft tissue (which includes pre-
      laryngeal strap muscles and subcutaneous fat)
T4b  Tumor invades prevertebral fascia, encases
       carotid artery, or involves mediastinal structures
     
TX  Primary tumor cannot be assessed
T0  No evidence of primary tumor
Tis Carcinoma 'in situ'
T1  Tumor limited to one subsite of hypopharynx
      and 2 cm or less in greatest dimension
T2  Tumor involves more than one subsite of
      hypopharynx or an adjacent site, or measures more

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

Primary Tumor (T)
      dimension without fixation of hemilarynx
T3   Tumor more than 4 cm in greatest dimension or with fixation of
      hemilarynx or extension to esophagus
T4a  Moderately advanced local disease.
     Tumor invades thyroid/cricoid cartilage, hyoid bone, thyroid gland,
      or central compartment soft tissue
T4b  Very advanced local disease.
     Tumor invades prevertebral fascia, encases carotid artery, or
      involves mediastinal structures
 
TX   Primary tumor cannot be assessed
T0   No evidence of primary tumor
Tis  Carcinoma in situ
T1   Tumor limited to one subsite of hypopharynx and/or 2 cm or less in 
      greatest dimension
T2   Tumor invades more than one subsite of hypopharynx or an adjacent
      site, or measures more than 2 cm but not more than 4 cm in greatest

• 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
• CRICOPHARYNX
• CRICOID, NOS

• CBA
  CODE:   TX
  ACOS CODE:   TX
• NET
  CODE:   T0
  ACOS CODE:   T0
• Carcinoma 'in situ'
  CODE:   Tis
  ACOS CODE:   TIS
• Limited to 1 subsite
  CODE:   T1
  ACOS CODE:   T1
• > 1 subsite, w/o fix of hemilarynx
  CODE:   T2
  ACOS CODE:   T2
• > 1 subsite, w fix of hemilarynx
  CODE:   T3
  ACOS CODE:   T3
• TIAS
  CODE:   T4
  ACOS CODE:   T4
• NA
  CODE:   NA
  ACOS CODE:   NA

• NCA
  CODE:   NX
  ACOS CODE:   NX
• NRN
  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