ESOPHAGUS, MIDDLE THIRD (67154)    ICDO TOPOGRAPHY (164)

• Distant metastasis cannot be assessed
  CODE:   X
  ACOS CODE:   MX
• No distant metastasis
  CODE:   M0
  ACOS CODE:   M0
• Distant metastasis
  CODE:   M1
  ACOS CODE:   M1
• NA
  CODE:   M1a
  ACOS CODE:   M1A
• Nonregional lymph nodes/other distant metastasis
  CODE:   M1b
  ACOS CODE:   M1B
• NA
  CODE:   NA
  ACOS CODE:   NA

Primary Tumor (T)
     
TX  Primary tumor cannot be assessed
T0  No evidence of primary tumor
Tis Carcinoma 'in situ'
T1  Tumor invades lamina propria or submucosa
T2  Tumor invades muscularis propria
T3  Tumor invades adventitia
T4  Tumor invades adjacent structures

Regional Lymph Nodes (N)

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

Distant Metastasis (M)
For tumors of midthoracic esophogus use
only M1b, since these tumors with metastasis
in nonregional lymph nodes have an equally
poor prognosis as those with metastasis in
other distant sites.

MX  Distant metastasis cannot be assessed
M0  No distant metastasis
M1  Distant metastasis
M1a Not applicable
M1b Nonregional lymph nodes and/or other distant
      metastasis

• DESCRIPTION:   Distant metastasis cannot be assessed
  CODE:   Mx
• DESCRIPTION:   No distant metastasis
  CODE:   M0
• DESCRIPTION:   Distant metastasis
  CODE:   M1
• DESCRIPTION:   NA
  CODE:   M1a
• DESCRIPTION:   Nonregional lymph nodes/other distant metastasis
  CODE:   M1b
• DESCRIPTION:   NA
  CODE:   NA