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Case Reports in Urology
Volume 2014, Article ID 397427, 3 pages
Case Report

Stone Formation from Nonabsorbable Clip Migration into the Collecting System after Robot-Assisted Partial Nephrectomy

1Department of Urology, Temple University School of Medicine, 255 S 17th Street, Suite #2101, Philadelphia, PA 19103, USA
2Division of Urology, University of Pennsylvania School of Medicine, Philadelphia, PA, USA

Received 19 December 2013; Accepted 20 January 2014; Published 23 February 2014

Academic Editors: A. Goel, S. K. Hong, C. Liao, and F. Ramezanzadeh

Copyright © 2014 Ziho Lee 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.


We describe a case in which a Weck Hem-o-lok clip (Teleflex, Research Triangle Park, USA) migrated into the collecting system and acted as a nidus for stone formation in a patient after robot-assisted partial nephrectomy. The patient presented 2 years postoperatively with left-sided renal colic. Abdominal computed tomography scan showed a 10 millimeter renal calculus in the left middle pole. After using laser lithotripsy to fragment the overlying renal stone, a Weck Hem-o-lok clip was found to be embedded in the collecting system. A laser fiber through a flexible ureteroscope was used to successfully dislodge the clip from the renal parenchyma, and a stone basket was used to extract the clip.