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Case Reports in Nephrology
Volume 2012, Article ID 374107, 7 pages
Case Report

Retroperitoneal Extrarenal Angiomyolipomas: An Evidence-Based Approach to a Rare Clinical Entity

1Department of Surgery, Saint Barnabas Medical Center, Livingston, NJ 07039, USA
2School of Medicine, St. George’s University, Grenada
3Department of Pathology, Saint Barnabas Medical Center, Livingston, NJ 07039, USA
4Department of Surgery, University of Medicine and Dentistry of New Jersey, Newark, NJ, USA

Received 19 May 2012; Accepted 21 June 2012

Academic Editors: S. Kavukcu, W. Sulowicz, and L. Zuo

Copyright © 2012 Emmanuel J. Minja et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Extrarenal angiomyolipomas (ERAMLs) are rare tumors that present as incidentalomas upon imaging for other conditions. Retroperitoneal ERAMLs present a unique challenge from a diagnostic and treatment standpoint as they can mimic other benign and malignant retroperitoneal tumors. We present a case of a 39-year-old female with a 19.3 cm × 13.5 cm × 10.7 cm left extrarenal retroperitoneal mass. Histopathologic examination and HMB-45 staining revealed the mass to be a retroperitoneal ERAML. Our case report provides a comprehensive literature review and an evidence-based algorithm for taking care of patients with ERAMLs.