Open Access

RESIDENT’S CORNER

Mixed epithelial stromal renal tumor with dystrophic ossifi cation: a case report and literature review

Michael C. Large, Hikmat Al-Ahmadie, Arieh L. Shalhav, Kevin C. Zorn

Section of Urology, University of Chicago Medical Center, Chicago, Illinois, USA
Address correspondence to Dr. Michael C. Large, University of Chicago, Section of Urology, 5841 S. Maryland Avenue-MC6038, Chicago, IL 60637 USA

Canadian Journal of Urology 2009, 16(3), 4690-4693.

Abstract

A 25-year-old female presented with worsening right fl ank pain and a 9 year history of a slow growing 4 centimeter calcifi ed renal mass. The lesion was resected by laparoscopic partial nephrectomy revealing a mixed epithelial and stromal tumor (MEST). This tumor has unusual features including the extensive amount of dystrophic calcifi cation and the young age at presentation. Herein, we present a focused review of the literature regarding MESTs, as well as a discussion of calcifi ed renal mass management. We conclude that laparoscopy may be utilized to safely perform nephron sparing surgery for select, calcifi ed renal masses.

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