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Case Reports in Oncological Medicine
Volume 2015, Article ID 532656, 4 pages
http://dx.doi.org/10.1155/2015/532656
Case Report

Primary Mesenteric Undifferentiated Pleomorphic Sarcoma Masquerading as a Colon Carcinoma: A Case Report and Review of the Literature

1Medical Oncology Department, University Hospital La Fe, Avinguda de Fernando Abril Martorell, No. 106, 46026 Valencia, Spain
2Pathology Department, University Hospital La Fe, Avinguda de Fernando Abril Martorell, No. 106, 46026 Valencia, Spain

Received 22 March 2015; Revised 25 July 2015; Accepted 6 August 2015

Academic Editor: Francesca Micci

Copyright © 2015 Robert Diaz-Beveridge 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

Undifferentiated pleomorphic sarcoma (UPS) is the most common sarcoma that appears in older patients, usually in the extremities and the retroperitoneum. Other locations are rare. By definition, in UPS, although the malignant cells tend to appear fibroblastic or myofibroblastic, they should not show differentiation towards a more specific line of differentiation. In this sense, we report the case of an 80-year-old patient with an initial clinical diagnosis of a locally advanced colonic neoplasm that was later confirmed as a primary mesenteric UPS. Primary mesenteric UPS are extremely rare with less than 20 cases reported. We also review the pathologic and radiologic diagnostic criteria and the natural history of these tumours.