We report 2 cases of mixed epithelial and stromal tumours revealed by flank pain in a 56-year-old woman and by a renal biopsy in another asymptomatic woman. A greater awareness among urologists and radiologists of the features of mixed epithelial and stromal tumours could help evoke this diagnosis preoperatively leading to needle biopsy and to the most appropriate type of renal surgery.

1.
Montironi R, Mazzucchelli R, Lopez-Beltran A, et al: Cystic nephroma and mixed epithelial and stromal tumour of the kidney: opposite ends of the spectrum of the same entity? Eur Urol 2008;54:1237-1246.
2.
Lopez-Beltran A, Scarpelli M, Montironi R, Kirkali Z: 2004 WHO classification of the renal tumors of the adults. Eur Urol 2006;49:798-805.
3.
Mohanty SK, Parwani AV: Mixed epithelial and stromal tumors of the kidney: an overview. Arch Pathol Lab Med 2009;133:1483-1486.
4.
Wood CG 3rd, Casalino DD: Mixed epithelial and stromal tumor of the kidney. J Urol 2011;186:677-678.
5.
Zhou M, Kort E, Hoekstra P, et al: Adult cystic nephroma and mixed epithelial and stromal tumor of the kidney are the same disease entity: molecular and histologic evidence. Am J Surg Pathol 2009;33:72-80.
6.
Neuzillet Y, Lechevallier E, Andre M, et al: Accuracy and clinical role of fine needle percutaneous biopsy with computerized tomography guidance of small (less than 4.0 cm) renal masses. J Urol 2004;171:1802-1805.
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