Renal oncocytoma: gross pathology and histology

Case contributed by Dr Andrew Ryan

Presentation

Right renal mass - no clinical symptoms

Patient Data

Age: 40 years
Gender: Female

Right radical nephrectomy performed

Modality: Pathology

Macroscopic

Right kidney with well circumscribed tan tumour, 100mm in diameter, in the upper pole. There is a central stellate scar and macroscopic haemorrhage.

Microscopic

(H&E x40)  - Sections from scar showing fibrosis (left 1/3 of picture) and osseous metaplasia. Haematopoiesis was present within the medullary space on higher power.  

(H&E x200) - Uniform tumour cells with rounded nuclei and eosinophilic, partly vacuolated cytoplasm (the latter is a variant finding with oncocytoma cells usually showing uniform eosinophilic cytoplasm)

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Case Information

rID: 20205
Case created: 7th Nov 2012
Last edited: 14th Oct 2016
System: Urogenital
Inclusion in quiz mode: Excluded

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