NEUROENDOCRINE COLON OR RECTUM (59)    AJCC STAGING GROUPS (164.33)

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

Primary Tumor (T)
T3   Tumor invades through the muscularis propria into the subserosa, or
      into non-peritonealized pericolic or perirectal tissues
T4   Tumor invades peritoneum or other organs
 
TX   Primary tumor cannot be assessed
T0   No evidence of primary tumor
T1   Tumor invades lamina propria or submucosa and size < or = 2 cm
T1a  Tumor size <1 cm in greatest dimension
T1b  Tumor size 1 to 2 cm in greatest dimension
T2   Tumor invades muscularis propria or size >2 cm with invasion of
      lamina propria or submucosa

• N-CODE:   X

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)
 
M0  No distant metastasis
M1  Distant metastasis