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| Stage | White | Black |
| Local | 20% | 19% |
| Regional | 30% | 20% |
| Distant | 35% | 36% |
| Stage | White | Black |
| All | 19% | 22% |
| Local | 56% | 56% |
| Regional | 19% | 26% |
| Distant | 2% | 3% |
| Stage Information The American Joint Committee on Cancer (AJCC) has designated staging by TNM classification.TNM definitions 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 or submucosa T2: Tumor invades the muscularis propria or the subserosa* T3: Tumor penetrates the serosa (visceral peritoneum) without invading adjacent structures**,*** T4: Tumor invades adjacent structures*** *Note: A tumor may penetrate the muscularis propria with extension into the gastrocolic or gastrohepatic ligaments or into the greater or lesser omentum without perforation of the visceral peritoneum covering these structures. In this case, the tumor is classified T2. If there is perforation of thevisceral peritoneum covering the gastric ligaments or omentum, the tumor should be classified T3. **Note: The adjacent structures of the stomach include the spleen, transverse colon, liver, diaphragm, pancreas, abdominal wall, adrenal gland, kidney,small intestine, and retroperitoneum. ***Note: Intramural extension to the duodenum or esophagus is classified by the depth of greatest invasion in any of these sites, including stomach. Regional lymph nodes (N) The regional lymph nodes are the perigastric nodes, found along the lesser and greater curvatures, and the nodes located along the left gastric, common hepatic, splenic, and celiac arteries. For pN, a regional lymphadenectomy specimen will ordinarily contain at least 15 lymph nodes. Involvement of other intra-abdominal lymph nodes, such as the hepatoduodenal, retropancreatic, mesenteric, and para-aortic, is classified as distant metastasis. NX: Regional lymph node(s) cannot be assessed N0: No regional lymph node metastasis N1: Metastasis in 1 to 6 regional lymph nodes N2: Metastasis in 7 to 15 regional lymph nodes N3: Metastasis in more than 15 regional lymph nodes Distant metastasis (M) MX: Distant metastasis cannot be assessed M0: No distant metastasis M1: Distant metastasis AJCC stage groupings Stage 0: Tis, N0, M0 Stage IA: T1, N0, M0 Stage IB: T1, N1, M0, T2, N0, M0 Stage II: T1, N2, M0, T2, N1, M0, T3, N0, M0 Stage IIIA: T2, N2, M0, T3, N1, M0, T4, N0, M0 Stage IIIB: T3, N2, M0 Stage IV: T4, N1, M0, T1, N3, M0, T2, N3, M0, T3, N3, M0, T4, N2, M0, T4, N3, M0, Any T, Any N, M1 |