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Table 1 Staging of oesophageal cancer — TNM system

From: Staging of oesophageal cancer

T0 No evidence of primary tumour
Tis Carcinoma in situ
T1 Tumour invades lamina propria or submucosa
T2 Tumour invades muscularis propria
T3 Tumour invades adventitia
T4 Tumour invades adjacent structures
N0 No regional nodes
N1 Regional nodal metastases — cervical, mediastinal and perigastric
M0 No distant spread
M1 Distant spread
Lower oesophagus
M1a — metastases in coeliac nodes, M1b — distant metastases
Upper oesophagus
M1a — metastases in cervical nodes, M1b — distant metastases
M1a — not apply, M1b — non regional nodes, distant metastases
0 Tis N0 M0
1 T1 N0 M0
11A T2 N0 M0
  T3 N0 M0
11B T1 N1 M0
  T2 N1 M0
111 T3 N1 M0
  T4 N0/1 M0
IV T1-4 N0/1 M1