Primary tumor (T) | |||
TX | Primary tumor cannot be assessed | ||
T0 | No evidence of primary tumor | ||
Tis | Carcinoma in situ: intraepithelial tumor without invasion of the lamina propria | ||
T1 | Tumor invades lamina propria, muscularis mucosae, or submucosa | ||
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¶Δ | ||
T4 | Tumor invades serosa (visceral peritoneum) or adjacent structures¶Δ | ||
T4a | Tumor invades serosa (visceral peritoneum) | ||
T4b | Tumor invades adjacent structures | ||
Regional lymph nodes (N) | |||
NX | Regional lymph node(s) cannot be assessed | ||
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 | ||
N3a | Metastasis in 7-15 regional lymph nodes | ||
N3b | Metastasis in 16 or more regional lymph nodes | ||
Distant metastasis (M) | |||
M0 | No distant metastasis | ||
M1 | Distant metastasis | ||
Anatomic stage/prognostic groups | |||
Stage 0 | Tis | N0 | M0 |
Stage IA | T1 | N0 | M0 |
Stage IB | T2 | N0 | M0 |
T1 | N1 | M0 | |
Stage IIA | T3 | N0 | M0 |
T2 | N1 | M0 | |
T1 | N2 | M0 | |
Stage IIB | T4a | N0 | M0 |
T3 | N1 | M0 | |
T2 | N2 | M0 | |
T1 | N3 | M0 | |
Stage IIIA | T4a | N1 | M0 |
T3 | N2 | M0 | |
T2 | N3 | M0 | |
Stage IIIB | T4b | N0 | M0 |
T4b | N1 | M0 | |
T4a | N2 | M0 | |
T3 | N3 | M0 | |
Stage IIIC | T4b | N2 | M0 |
T4b | N3 | M0 | |
T4a | N3 | M0 | |
Stage IV | Any T | Any N | M1 |
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