Editing Benign Kidney Tumours (section)

== Mixed epithelial and stromal tumours ==

* '''Epidemiology'''
** '''Rare; female predominance''' with a diagnostic peak in the 5th decade; should be considered in perimenopausal women receiving hormone therapy
* Pathology
** Variable mix of epithelial and mesenchymal components
* Typically benign clinical course, but malignant transformations and recurrence have been described
* Radiographic appearance is of a complex cystic renal mass (Bosniak III to IV), indistinguishable from cystic RCC, therefore usually managed with surgical approach