胸外。食道癌

1.食道癌分期：

T Stages
Tis: carcinoma in situ

T1: lamina propria/submucosa

T2: muscularis propria

T3: adventitia

T4: nearby structures

N Stages
N0: no spread to nearby LNs

N1: spread to nearby LNs

M Stages
M0: no spread to distant organs

M1a: spread to distant LNs

M1b: spread to distant organs