SINUS, ETHMOID (67311)    ICDO TOPOGRAPHY (164)

• CBA
  CODE:   TX
• NET
  CODE:   T0
• Carcinoma 'in situ'
  CODE:   Tis
• Ethmoid w/wo bone erosion
  CODE:   T1
• Nasal cavity
  CODE:   T2
• Anterior orbit/maxillary sinus
  CODE:   T3
• Intracranial/orbital ext inc apex
  CODE:   T4
• NA
  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

Primary Tumor (T)
       and/or maxillary sinus
T4  Tumor with intracranial extension,
      orbital extension including apex,
      involving sphenoid, and/or frontal
      sinus and/or skin of external nose
     
TX  Primary tumor cannot be assessed
T0  No evidence of primary tumor
Tis Carcinoma 'in situ'
T1  Tumor confined to the ethmoid with
      or without bone erosion
T2  Tumor extends into the nasal cavity
T3  Tumor extends to the anterior orbit,

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:   1 subsite, w/wo bony invasion
  CODE:   T1
• DESCRIPTION:   2 subsites, w/wo bony invasion
  CODE:   T2
• DESCRIPTION:   Medial wall or floor of orbit, maxillary sinus, etc.
  CODE:   T3
• DESCRIPTION:   Anterior orbital contents, skin of nose etc.
  CODE:   T4a
• DESCRIPTION:   Orbital apex, dura, brain, middle cranial fossa, etc.
  CODE:   T4b
• DESCRIPTION:   NA
  CODE:   NA

Primary Tumor (T)
      the nasoethmoidal complex, with or without bony
      invasion
T3  Tumor extends to invade the medial wall or
      floor of the orbit, maxillary sinus, palate, or
      cribriform plate
T4a Tumor invades any of the following:
      anterior orbital contents, skin of nose or cheek,
      minimal extension to anterior fossa, pterygoid,
      plates, sphenoid or frontal sinuses
T4b Tumor invades any of the following: orbital
     
      apex, dura, brain, middle cranial fossa, cranial
      nerves other than (V2), nasopharynx, or clivus
TX  Primary tumor cannot be assessed
T0  No evidence of primary tumor
Tis Carcinoma 'in situ'
T1  Tumor restricted to any 1 subsite, with or
      without bony invasion
T2  Tumor invading 2 subsites in a single region
      or extending to involve an adjacent region within

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

Primary Tumor (T)
T3   Tumor extends to invade the medial wall or floor of the orbit,
     maxillary sinus, palate, or cribriform plate
T4a  Moderately advanced local disease.
       Tumor invades any of the following: anterior orbital contents, skin
       of nose or cheek, minimal extension to anterior cranial fossa,
       pterygoid plates, sphenoid or frontal sinuses
T4b  Very advanced local disease.
       Tumor invades any of the following: orbital apex, dura, brain,
       middle cranial fossa, cranial nerves other than (V2), nasopharynx,
       or clivus
 
TX   Primary tumor cannot be assessed
T0   No evidence of primary tumor
Tis  Tis Carcinoma in situ
T1   Tumor restricted to any one subsite, with or without bony invasion
T2   Tumor invading two subsites in a single region or extending to
     involve an adjacent region within the nasoethmoidal complex, with or
     without bony invasion

• 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

• 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