Specimen:
   Stomach
   Portion of stomach:
       Gastric body
       Gastric antrum
       Not specified
   Distal esophagus
   Proximal duodenum
   Other (specify):
   Not specified

Procedure:
Endoscopic resection
Partial gastrectomy, proximal
Partial gastrectomy, distal
Partial gastrectomy, other (specify):
Total gastrectomy
Other (specify):
Not specified

Specimen Size: cm

Tumor Site:
   Gastric cardia
   Gastric fundus
   Gastric body
   Gastric antrum
   Other (specify):
   Not specified

Tumor Size:
   Greatest dimension: cm (specify size of largest tumor if multiple tumors are present)
   Additional dimensions: cm
   Cannot be determined (see Comment)

Tumor Focality:
Unifocal
Multifocal (number of tumors: )
Cannot be determined

Histologic Type:
Carcinoid tumor
Other (specify):

Alternative Histologic Classification:
    Well-differentiated endocrine tumor, benign behavior
    Well-differentiated endocrine tumor, uncertain behavior
    Well-differentiated endocrine carcinoma

Histologic Grade:
    Not applicable
    GX: Cannot be assessed
    G1: Low grade
    G2: Intermediate grade
    Other (specify):

For poorly differentiated (high-grade) neuroendocrine carcinomas, the College of American Pathologists (CAP) checklist for carcinoma of the stomach should be used

Mitotic Rate:
/10 high-power fields (HPF)
Cannot be determined

Microscopic Tumor Extension:
   Cannot be assessed
   No evidence of primary tumor
   Tumor invades lamina propria
   Tumor invades into but not through muscularis mucosae
   Tumor invades submucosa
   Tumor invades muscularis propria
   Tumor invades subserosal tissue without involvement of visceral peritoneum
   Tumor penetrates serosa (visceral peritoneum)
   Tumor directly invades adjacent structures ()
   Tumor penetrates to the surface of the visceral peritoneum (serosa) and directly invades adjacent structures ()

Margins:
   Proximal Margin:
    Cannot be assessed
    Uninvolved by neuroendocrine tumor
    Involved by neuroendocrine tumor
    Involved by neuroendocrine cell hyperplasia/dysplasia
   Distal Margin:
    Cannot be assessed
    Uninvolved by neuroendocrine tumor
    Involved by neuroendocrine tumor
    Involved by neuroendocrine cell hyperplasia/dysplasia
   Omental (Radial) Margin:
    Cannot be assessed
    Uninvolved by neuroendocrine tumor
    Involved by neuroendocrine tumor
   Deep Margin (applies to endoscopic resections):
    Cannot be assessed
    Uninvolved by tumor
    Involved by tumor
    Not applicable
   Lateral Mucosal Margins (applies to endoscopic resections):
    Cannot be assessed
    Uninvolved tumor
    Involved by tumor
    Not applicable
   Other Margin(s) ():
    Not applicable
    Cannot be assessed
    Uninvolved by neuroendocrine tumor
    Involved by neuroendocrine tumor
    Involved by neuroendocrine cell hyperplasia/dysplasia

Distance of tumor from closest margin: at

Lymph-Vascular Invasion:
Not identified
Present
Indeterminate

Perineural Invasion:
    Not identified
    Present
    Indeterminate

Pathologic Staging (pTNM)

TNM Descriptors:
       m (multiple primary tumors)
       r (recurrent)
       y (posttreatment)

Primary Tumor (pT):
pTX: Primary tumor cannot be assessed
pT0: No evidence of primary tumor
pTis: Carcinoma in situ/dysplasia (tumor size less than 0.5 mm), confined to mucosa
pT1: Tumor invades lamina propria or submucosa and 1 cm or less in size
pT2: Tumor invades muscularis propria or more than 1 cm in size
pT3: Tumor penetrates subserosa
pT4: Tumor invades visceral peritoneum (serosal) or other organs or adjacent structures

Regional Lymph Nodes (pN):
Cannot be assessed
pN0: No regional lymph node metastasis ( 0 / )
pN1: Metastasis in regional lymph nodes ( / )
No nodes submitted or found

Distant Metastasis (pM):
    Not applicable
    pM1: Distant metastasis at

Ancillary Studies:
       Ki-67 index:
        ≤2%
        >2% to 20%
        >20%
       Other (specify):
       Not performed

Additional Pathologic Findings:
       Atrophic gastritis
       Intestinal metaplasia of gastric mucosa
       Glandular dysplasia of gastric mucosa
       Endocrine cell hyperplasia
       Absence of parietal cells
       Tumor necrosis
       Other, specify:

Comment(s):