Features to report for tumors

Topic Completed: 1 August 2012

Minor changes: 29 April 2019

Revised: 23 January 2019

Copyright: (c) 2003-2019,, Inc.

PubMed Search: Appendix[TI] features to report

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Table of Contents
Definition / general
Cite this page: Mansouri J. Features to report for tumors. website. Accessed May 30th, 2020.
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 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)

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