TNM | Stage |
|
T | T1a | Tumor invades lamina propria or muscularis mucosae |
| T1b | Tumor invades submucosa |
| T2 | Tumor invades muscularis propria |
| T3 | Tumor penetrates subserosal connective tissue without invasion of visceral peritoneum or adjacent structures |
| T4a | Tumor invades serosa (visceral peritoneum) |
| T4b | Tumor invades adjacent structures |
N | N0 | No regional lymph node metastasis |
| N1 | Metastasis in 1 - 2 regional lymph nodes |
| N2 | Metastasis in 3 - 6 regional lymph nodes |
| N3 | Metastasis in seven or more regional lymph nodes |
M | M0 | Distant metastasis absent |
| M1 | Distant metastasis present |