SMALL INTESTINE, DUODENUM (67170)    ICDO TOPOGRAPHY (164)

Primary Tumor (T)
      perimuscular tissue (mesentery or retroperitoneum)
      with extension 2 cm or less
T4  Tumor perforates the visceral peritoneum, or directly
      invades other organs or structures (includes other
      loops of small intestine, mesentery, or retroperitoneum
      more than 2 cm, and abdominal wall by way of serosa;
      for duodenum only, invasion of pancreas)
     
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 through the muscularis propria
      into the subserosa or into the nonperitonealized

Regional Lymph Nodes (N)

NX  Regional lymph node(s) cannot be assessed
N0  No regional lymph node metastasis
N1  Regional lymph node metastasis

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

Primary Tumor (T)
      into the nonperitonealized perimuscular tissue (mesentery or
      retroperitoneum) with extension 2 cm or less
T4   Tumor perforates the visceral peritoneum or directly invades other
      organs or structures (includes other loops of small intestine,
      mesentery, or retroperitoneum more than 2 cm, and abdominal wall by
      way of serosa; for duodenum only, invasion of pancreas or bile duct)
 
TX   Primary tumor cannot be assessed
T0   No evidence of primary tumor
Tis  Carcinoma in situ
T1a  Tumor invades lamina propria
T1b  Tumor invades submucosa
T2   Tumor invades muscularis propria
T3   Tumor invades through the muscularis propria into the subserosa or

• N-CODE:   X

Regional Lymph Nodes (N)
 
NX  Regional lymph nodes cannot be assessed
N0  No regional lymph node metastasis
N1  Metastasis in 1 to 3 regional lymph nodes
N2  Metastasis in 4 or more regional lymph nodes

• DUODENUM
• INTESTINE

• CBA
  CODE:   TX
  ACOS CODE:   TX
• NET
  CODE:   T0
  ACOS CODE:   T0
• Carcinoma 'in situ'
  CODE:   Tis
  ACOS CODE:   TIS
• Invades lamina propria or submucosa
  CODE:   T1
  ACOS CODE:   T1
• Invades muscularis propria
  CODE:   T2
  ACOS CODE:   T2
• Inv subserosa/nonperi perimuscular < 2 cm
  CODE:   T3
  ACOS CODE:   T3
• Perforates visceral peritoneum/other organs
  CODE:   T4
  ACOS CODE:   T4
• NA
  CODE:   NA
  ACOS CODE:   NA

• NCA
  CODE:   NX
  ACOS CODE:   NX
• NRN
  CODE:   N0
  ACOS CODE:   N0
• Regional lymph node metastasis
  CODE:   N1
  ACOS CODE:   N1
• NA
  CODE:   NA
  ACOS CODE:   NA