Adrenal gland and paraganglia
Adrenocortical carcinoma
Oncocytic variant

Author: Pallav Gupta, M.D. (see Authors page)

Revised: 13 August 2018, last major update September 2013

Copyright: (c) 2002-2018,, Inc.

PubMed Search: Oncocytic[title] carcinoma adrenal

Cite this page: Gupta, P. Adrenocortical carcinoma - oncocytic variant. website. Accessed October 20th, 2018.
Definition / general
  • Rare variant, ~115 cases reported
  • Weiss system for malignancy not applicable because all tumors have eosinophilic tumor cytoplasm, diffuse architecture and nuclear atypia
  • Lin-Weiss-Bisceglia (LWB) system:
    • Major criteria: mitotic rate > 5 mitoses per 50 high power fields, any atypical mitoses or venous invasion
    • Minor criteria: > 10 cm or > 200 g, necrosis, capsular invasion or sinusoidal invasion
    • Proposed working rules:
      • Malignant (oncocytic adrenocortical carcinoma): any major criteria
      • Uncertain potential (borderline oncocytic neoplasm of uncertain malignant potential): only minor criteria
      • Benign (adrenocortical oncocytoma): no major, no minor criteria
Clinical features
  • Ages 39 - 71
  • Usually nonfunctional
  • One tumor invaded the inferior vena cava and extended into the right atrium, another metastasized to bone
Gross description
  • Large yellow tan tumors (8.5 to 17.0 cm), well demarcated from adjacent kidney
  • Thin rim of normal adrenal gland
Gross images

Images hosted on other servers:

Large multinodular
yellow tumor with
central necrosis

Microscopic (histologic) description
  • Diffuse proliferation of polygonal cells with abundant granular and eosinophilic cytoplasm, large nuclei and prominent nucleoli
  • Occasional mononuclear and binucleated giant cells
  • Often extracapsular extension, blood vessel invasion and necrosis
  • Variable atypia; mitotic figures
Microscopic (histologic) images

Images hosted on PathOut server:

Contributed by Debra Zynger, M.D.

Oncocytic variant

Images hosted on other servers:

Binucleated cell with prominent nucleoli

Positive stains
  • AE1 / AE3, CAM5.2, variable inhibin
Electron microscopy description
  • Numerous mitochondria
Differential diagnosis