Somatostatin analogs for gastric carcinoids: For many, but not all

Table 3 Scoring staging system according to tumor-node-metastasis[26]

T-primary tumor
TX	Primary tumor cannot be assessed
T0	No evidence of primary tumor
Tis	In-situ tumor/dysplasia (< 0.5 mm)
T1	Tumor invades lamina propria or submucosa and < 1 cm
T2	Tumor invades muscularis propria or subserosa or > 1 cm
T3	Tumor penetrates serosa
T4	Tumor penetrates serosa and/or invades adjacent structures
N-regional lymph nodes
NX	Regional lymph nodes cannot be assessed
N0	No regional lymph node metastasis
N1	Regional lymph node metastasis
M-metastases
MX	Distant metastasis cannot be assessed
M0	No distant metastases
M1	Distant metastases
Stage
0	Tis N0 M0
1	T1 N0 M0
2A	T2 N0 M0
2B	T3 N0 M0
3A	T4 N0 M0
3B	Any T N1 M0
4	Any T Any N M1