Specimen:
Appendix
Cecum
Right colon
Terminal ileum
Other (specify):
Not specified

Procedure:
Appendectomy:
       Length: cm
Appendectomy and right colectomy:
       Length of appendix: cm
       Length of colonic segment: cm
Other (specify):

Specimen Integrity:
Intact
Fragmented ( pieces)
Other (specify):

Specimen Size: cm

Tumor Site:
Proximal half of appendix
Distal half of appendix
Diffusely involving appendix
Appendix, not otherwise specified
Unknown
Other (specify):

Tumor Size:
   Greatest dimension: cm
   Additional dimensions: cm
   Cannot be determined (see Comment)

Histologic Type:
Carcinoid
Atypical carcinoid
Other (specify):

Alternate 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 neuroendocrine carcinomas, the College of American Pathologists (CAP) checklist for carcinoma of the appendix 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 submucosa
   Tumor invades muscularis propria
   Tumor invades subserosal tissue without involvement of visceral peritoneum
   Tumor extends into mesoappendix
   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 tumor
    Involved by tumor
   Distal Margin (not applicable for appendectomy specimens):
    Not applicable
    Cannot be assessed
    Uninvolved by tumor
    Involved by tumor
   Mesenteric (Mesoappendiceal) Margin:
    Cannot be assessed
    Uninvolved by tumor, distance to closest margin:
    Involved by tumor
   Circumferential (Radial) Margin:
    Not applicable
    Cannot be assessed
    Uninvolved by tumor
    Involved by tumor (tumor present 0 to 1 mm from margin)

Distance of tumor from closest margin: mm 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
pT1: Tumor 2 cm or less in greatest dimension
pT1a: Tumor 1 cm or less in greatest dimension
pT1b: Tumor more than 1 cm but not more than 2 cm
pT2: Tumor more than 2 cm but not more than 4 cm or with extension to the cecum
pT3: Tumor more than 4 cm or with extension to the ileum
pT4: Tumor directly invades other adjacent organs or structures, eg, abdominal wall and skeletal muscle

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

Distant Metastasis:
    Not applicable
    pM1: Distant metastasis ( )

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

Additional Pathologic Findings:
       Tumor necrosis
       Acute appendicitis
       Other (specify):

Comments: