Editing Benign Kidney Tumours (section)

=== Pathology ===
* '''Derived from the collecting duct/distal renal tubules, similar to chromophobe and collecting duct RCC'''
** '''Recall that clear cell and papillary RCC are derived from the proximal tubules'''
* '''Cells demonstrate an abundance of mitochondria'''
* Hemorrhage, extension into perinephric fat, vascular invasion, cellular atypia, prominent nucleoli, and pleomorphism may be seen in up to 1/3rd of patients, yet the clinical behavior in these cases is benign
[[File:Stellate scar in right renal mass.jpg|alt=Stellate scar in right renal mass. Source: Wikipedia|thumb|500x500px|Stellate scar in right renal mass. Source: [[commons:File:Onkozytom_der_Niere.jpg|Wikipedia]]]]