Renal oncocytoma


  • Benign renal epithelial neoplasm composed of large round-to-polygonal cells with abundant mitochondria-rich eosinophilic cytoplasm

Clinical features


  • 4%–8% of adult renal epithelial neoplasms in surgical pathology

  • Wide range of age distribution with a peak incidence in the seventh decade of life

  • Male-to-female ratio of 2:1

  • Rare cases are associated with Birt-Hogg-Dube syndrome

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