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Table 71-1

Staging System for Gastric Carcinoma

Stage TNM Features Data from ACS
No. of Cases, %5-Year Survival, %
0TisN0M0Node negative; limited to mucosa190
IAT1N0M0Node negative; invasion of lamina propria or submucosa759
IB

T2N0M0

T1N1M0

Node negative; invasion of muscularis propria1044
II

T1N2M0

T2N1M0

Node positive; invasion beyond mucosa but within wall1729
Or
T3N0M0Node negative; extension through wall
IIIA

T2N2M0

T3N1-2M0

Node positive; invasion of muscularis propria or through wall2115
IIIBT4N0-1M0Node negative; adherence to surrounding tissue149
IIICT4N2-3M0>3 nodes positive; invasion of serosa or adjacent structures
T3N3M07 or more positive nodes; penetrates wall without invading serosa or adjacent structures
IVT4N2M0Node positive; adherence to surrounding tissue303
Or
T1-4N0-2-M1Distant metastases

Abbreviations: ACS, American Cancer Society; TNM, tumor-node-metastasis.