TY - JOUR A2 - Micci, Francesca AU - Diaz-Beveridge, Robert AU - Melian, Marcos AU - Zac, Carlos AU - Navarro, Edwin AU - Akhoundova, Dilara AU - Chrivella, Melitina AU - Aparicio, Jorge PY - 2015 DA - 2015/08/26 TI - Primary Mesenteric Undifferentiated Pleomorphic Sarcoma Masquerading as a Colon Carcinoma: A Case Report and Review of the Literature SP - 532656 VL - 2015 AB - 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. SN - 2090-6706 UR - https://doi.org/10.1155/2015/532656 DO - 10.1155/2015/532656 JF - Case Reports in Oncological Medicine PB - Hindawi Publishing Corporation KW - ER -