STOMACH: Local Resection, GastrectomySpecimen: Stomach Portion of stomach: Gastric body Gastric antrum Distal esophagus Proximal duodenum Not specified Procedure Type: Endoscopic resection Partial gastrectomy, proximal Partial gastrectomy, distal Partial gastrectomy, other (specify): Total gastrectomy Other (specify): Not specified Tumor Site: Fundus: Anterior wall Posterior wall Body: Anterior wall Posterior wall Lesser curvature Greater curvature Antrum: Anterior wall Posterior wall Lesser curvature Greater curvature Other (specify): Not specified Tumor Size: Greatest dimension (cm): Additional dimensions: x cm Cannot be determined (see Comment) Histologic Type: Adenocarcinoma, intestinal type Adenocarcinoma, diffuse type Papillary adenocarcinoma Tubular adenocarcinoma Mucinous adenocarcinoma (greater than 50% mucinous) Signet-ring cell carcinoma (greater than 50% signet-ring cells) Other (specify): Carcinoma, not otherwise specified Histologic Grade: Not applicable GX: Cannot be assessed G1: Well differentiated G2: Moderately differentiated G3: Poorly differentiated G4: Undifferentiated Other (specify): Microscopic Extent of Tumor: High-grade dysplasia/carcinoma in situ Tumor invades lamina propria Tumor invades muscularis mucosae Tumor invades submucosa Tumor invades muscularis propria Tumor invades subserosal connective tissue Tumor penetrates serosa (visceral peritoneum) Tumor directly invades adjacent structures (specify): Tumor penetrates to the surface of the visceral peritoneum (serosa) AND directly invades adjacent structures (specify: ): Margins Proximal Margin: Cannot be assessed Uninvolved by invasive carcinoma Involved by invasive carcinoma Carcinoma in situ/adenoma not identified at proximal margin Carcinoma in situ/adenoma present at proximal margin Distal Margin: Cannot be assessed Uninvolved by invasive carcinoma Involved by invasive carcinoma Carcinoma in situ/adenoma not identified at distal margin Carcinoma in situ/adenoma present at distal margin Omental (Radial) Margins: Cannot be assessed Uninvolved by invasive carcinoma Lesser omental margin involved by invasive carcinoma Greater omental margin involved by invasive carcinoma Deep Margin (applies to endoscopic resections): Cannot be assessed Uninvolved by invasive carcinoma Involved by invasive carcinoma Not applicable If all margins uninvolved by invasive carcinoma:Distance of invasive carcinoma from closest margin: mm at Treatment Effect (applicable to carcinomas treated with neoadjuvant therapy): No prior treatment Present: No residual tumor (complete response, grade 0) Marked response (grade 1, minimal residual cancer) Moderate response (grade 2) No definite response identified (grade 3, poor or no response) Not known Lymph-Vascular Invasion: Not identified Present Indeterminate Perineural Invasion: Not identified Present Indeterminate Pathologic Staging (pTNM) TNM Descriptors (required only if applicable) (select all that apply)m (multiple primary tumors) r (recurrent) y (post-treatment) Primary Tumor (pT): pTX: Cannot be assessed pT0: No evidence of primary tumor pTis: Carcinoma in situ pT1: Tumor invades lamina propria, muscularis mucosae, or submucosa pT1a: Tumor invades lamina propria or muscularis mucosae pT1b: Tumor invades submucosa pT2: Tumor invades muscularis propria pT3: Tumor invades subserosal connective tissue, without involvement of visceral peritoneum or adjacent structures pT4: Tumor involves serosa (visceral peritoneum) or adjacent structures pT4a: Tumor invades serosa (visceral peritoneum) pT4b: Tumor invades adjacent structures Regional Lymph Nodes (pN): pNX: Cannot be assessed pN0: No regional lymph node metastasis ( 0 / ) pN1: Metastasis in 1 to 2 perigastric lymph nodes ( / ) pN2: Metastasis in 3 to 6 perigastric lymph nodes ( / ) pN3: Metastasis in 7 or more perigastric lymph nodes ( / ) pN3a: Metastasis in 7 to 15 perigastric lymph nodes ( / ) pN3b: Metastasis in 16 or more perigastric lymph nodes ( / ) Distant Metastasis (pM): Not applicable pM1: Distant metastasis at Additional Pathologic Findings: None identified Intestinal metaplasia Dysplasia Gastritis: Helicobacter pylori-type gastritis Other gastritis (specify): Polyp(s) (type[s)]: Other (specify): Ancillary Studies: Specify: Not performed Patient History: Previous gastric surgery (specify): Other (specify): Not known Comments: