Radiofrequency-assisted partial nephrectomy for metanephric adenoma: a case report and literature review.

Metanephric adenoma (MA) is a rare benign tumor, diagnosis of which is often carried out after surgical treatment. In case of peripheral lesions, a partial nephrectomy (PN)--either open or laparoscopic may be preferred--and, furthermore, a radiofrequency (RF)-assisted procedure may facilitate adequate hemostasis. In November 2010, the authors performed a RF-assisted PN, according to Habib's technique, using a 4-needle bipolar device, on a woman affected by a small exophytic MA of the right kidney. Fibrin glue was applied on the cut surface. Postoperative course was uneventful, and discharge was on postoperative day 4. MA is an extremely rare benign tumor with a favorable prognosis. In case of a preoperative cytological diagnosis, a careful follow-up has to be considered. PN represents the standard of care for small exophytic MA, and RF-assisted procedures allow an excellent hemostasis and a rapid conservative resection, with very low morbidity.