Adrenal gland & paraganglia


WHO classification

Topic Completed: 1 July 2018

Minor changes: 3 May 2021

Copyright: 2002-2021,, Inc.

PubMed Search: WHO classification of adrenal gland tumors

Andrey Bychkov, M.D., Ph.D.
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Cite this page: Bychkov A. WHO classification. website. Accessed December 6th, 2021.
Definition / general
  • This classification is applicable to tumors that occur in the adrenal gland
WHO (2017)

  • ICD-O note: the first four digits indicate the specific histological term; the fifth digit after the slash (/) is the behavior code, including /0 for benign tumors, /1 for unspecified, borderline or uncertain behavior, /2 for carcinoma in situ and grade III intraepithelial neoplasia (not used for adrenal tumors), and /3 for malignant tumors
  • Board review style question #1
    Which of these tumors arises from within the adrenal gland?

    1. Carotid body paraganglioma
    2. Jugulotympanic paraganglioma
    3. Laryngeal paraganglioma
    4. Pheochromocytoma
    5. Vagal paraganglioma
    Board review style answer #1
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