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Oncocytes (left of image), as seen in a renal oncocytoma. H&E stain.

An oncocyte is an epithelial cell characterized by an excessive number of mitochondria, resulting in an abundant acidophilic, granular cytoplasm. Oncocytes can be benign or malignant.

Other names[edit]

Also known as:

  • Hürthle cell (thyroid gland only)
  • Oxyphilic cell,
  • Askanazy cell,
  • Apocrine metaplasia (breast gland only).


Derived from the Greek root onco-, which means mass, bulk.

See also[edit]

External links[edit]