Features to report for tumors

Reviewer: Jaleh Mansouri, M.D. (see Authors page)

Revised: 1 March 2016, last major update August 2012

Copyright: (c) 2003-2016,, Inc.
Table of Contents
Definition / general
Cite this page: Features to report for tumors. website. Accessed June 21st, 2018.
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)