Gallbladder & extrahepatic bile ducts
General
WHO classification

Editor-in-Chief: Debra Zynger, M.D.
Raul S. Gonzalez, M.D.

Topic Completed: 22 September 2020

Minor changes: 22 September 2020

Copyright: 2020, PathologyOutlines.com, Inc.

PubMed Search: WHO classification[TIAB] (gallbladder OR extrahepatic bile ducts)

Raul S. Gonzalez, M.D.
Page views in 2020 to date: 144
Table of Contents
Definition / general | WHO (2019)
Cite this page: Gonzalez RS. WHO classification. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/gallbladderwhoclassification.html. Accessed October 20th, 2020.
Definition / general
  • WHO classification of tumors of the gallbladder and extrahepatic bile ducts
  • Currently on 5th edition, published in 2019
  • Based on histologic appearance, not molecular characteristics
WHO (2019)

    Malignant epithelial tumors ICD-O codes
  • Adenocarcinoma, NOS 8140/3
  • Squamous cell carcinoma, NOS 8070/3
  • Carcinoma, undifferentiated, NOS 8020/3
  • Adenosquamous carcinoma 8560/3
  • Cholangiocarcinoma 8160/3
  • Neuroendocrine tumor, NOS 8240/3
    • Neuroendocrine tumor, grade 1 8240/3
    • Neuroendocrine tumor, grade 2 8249/3
    • Neuroendocrine tumor, grade 3 8249/3
  • Neuroendocrine carcinoma, NOS 8246/3
    • Large cell neuroendocrine carcinoma 8013/3
    • Small cell neuroendocrine carcinoma 8041/3
  • Mixed neuroendocrine - nonneuroendocrine neoplasm (MiNEN) 8154/3
Back to top
Image 01 Image 02