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Metanephric adenofibroma: robotic partial nephrectomy of a large Wilms tumor variant
Drexel University College of Medicine, Philadelphia, Pennsylvania, USA
Aug 2010 (Vol. 17, Issue 4, Pages( 5309 - 5312)
PMID: 20735912

Abstract

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  • PURPOSE: A case of the rare, benign, Wilms' tumor (WT) variant, metanephric adenofibroma (MAF), is presented.

    MATERIALS AND METHODS:

    The patient is a 21-year-old female with an incidentally discovered enhancing renal mass. The diagnosis, workup and treatment are outlined.

    RESULTS:

    The 19 cm renal mass was ultimately resected via robot-assisted partial nephrectomy. Pathologic diagnosis at our institution was confirmed as a MAF by the National Wilms' Tumor Study Group (NWTSG). CONCLUSION: Difficult to differentiate from WT, it is imperative that MAF be recognized and appropriately diagnosed because unlike adult WT, the natural history of MAF is indolent and adjuvant chemo/radiation therapy is rarely necessary. This case reinforces the importance of review of potential WT variants by the NWTSG.

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