benign renal tumours Flashcards
1
Q
what are the two main types of benign renal tumours?
A
- oncocytoma
- angimyolipoma
2
Q
what is an oncocytoma?
A
-benign tumour of oncocytes (epithelial cells with excessive amounts of mitochondria)
3
Q
how does oncocytoma present?
A
- 85% of time it is incidental
- loin pain
- haematuria
4
Q
how does oncocytoma present on CT?
A
spoke wheel pattern (very similar to clear cell RCC)
5
Q
how does oncocytoma present on biopsy?
A
small ,oval and well circumscribed
- mahogany brown with a central stellate scar
- very pink and granular cytoplasm
- Aggregates of eosinophilic cells, mitosis is rare and cells packed with mitochondria
6
Q
are oncocytomas known to metastasise?
A
no
7
Q
what is the management for oncocytoma?
A
observation 4-5 years if proven on biopsy
