Table of ContentsDefinition / general
Cite this page: Mansouri J. Features to report for tumors. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/appendixfeatures.html. Accessed December 8th, 2019.
Definition / general
- Tumor size
- Histologic type
- Histologic grade
- Depth of invasion
- Angiolymphatic invasion
- Perineural invasion
- Margin involvement (surgical, radial, mesenteric)
- Peritumoral satellite nodules (for appendiceal carcinomas)
- Lymph node involvement (total involved, total examined)
- Mitotic rate and Ki-67 labeling index (for appendiceal carcinoids)
- Additional findings such as diverticula
- As of June 2012, there are updated College of American Pathologists (CAP) protocols for both appendiceal adenocarcinomas and well-differentiated neuroendocrine tumors (NET) of the appendix: visit CAP.org and search for "Cancer Protocols and Checklists"
- Staging for NETS does not include poorly differentiated (high-grade, G3) neuroendocrine carcinomas, small cell carcinomas, and goblet cell carcinoids (use CAP protocol for appendiceal carcinomas)