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Case Reports in Pathology
Volume 2014, Article ID 391615, 4 pages
http://dx.doi.org/10.1155/2014/391615
Case Report

Carcinosarcoma of the Ureter with a Small Cell Component: Report of a Rare Pathologic Entity and Potential for Diagnostic Error on Biopsy

1Department of Pathology, Immunology and Laboratory Medicine, University of Florida College of Medicine, P.O. Box 100275, 1600 SW Archer Road, Gainesville, FL 32610-0275, USA
2Department of Urology, University of Florida, Gainesville, FL 32610, USA
3South Lake Hospital in Partnership with Orlando Health, 1900 Don Wickham Drive, Clermont, FL 34711, USA

Received 26 August 2014; Revised 5 November 2014; Accepted 9 December 2014; Published 24 December 2014

Academic Editor: Khin Thway

Copyright © 2014 Kent Newsom 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.

Abstract

Carcinosarcomas of the ureter are rare biphasic neoplasms, composed of both malignant epithelial (carcinomatous) and malignant mesenchymal (sarcomatous) components. Carcinosarcomas of the urinary tract are exceedingly rare. We report a unique case of a carcinosarcoma of the ureter with a chondrosarcoma and small cell tumor component arising in a 68-year-old male who presented with microscopic hematuria. CT intravenous pyelogram revealed right-sided hydroureter and hydronephrosis with thickening and narrowing of the right ureter. The patient underwent robot-assisted ureterectomy with bladder cuff excision and subsequent adjuvant chemotherapy. The patient is disease-free at 32 months after treatment. We provide a brief synoptic review of carcinosarcoma of the ureter and bladder with utilization of immunohistochemical (IHC) stains and potential diagnostic pitfalls.