[Typical renal metanephric adenoma. Conservative surgery]

Metanephric Adenoma is uncommon renal tumor included in the complex group of the embryologics or nefroblastics renal tumors. Generally occurs in young females and usually has excellent prognosis. It's important to differentiate of malignant variants, particularly renal cell papillary carcinoma, metanephric adenosarcoma and adult Wilms tumor. The suspicion and intraoperative analysis of the tumor can to facilitate the use of conservative renal surgery in order to avoid unnecessary radical and aggressive surgery. To exist cases of metastatic metanephric adenoma, and the totally benign characteristic of the metanephric adenoma and the malignant potential isn't totally clarify.