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Case Reports in Radiology
Volume 2011 (2011), Article ID 362391, 4 pages
http://dx.doi.org/10.1155/2011/362391
Case Report

Retroperitoneal Malignant Fibrous Histiocytoma Can Mimic a Hydatid Cyst

1Department of Radiology, Faculty of Medicine, Başkent University, 01250 Adana, Turkey
2Başkent Üniversitesi Adana Hastanesi, Dadaloğlu M., Serin Evler 39, Sokak no: 6, Yüreğir, 01250 Adana, Turkey
3Department of Pathology, Faculty of Medicine, Başkent University, 01250 Adana, Turkey
4Department of General Surgery, Faculty of Medicine, Başkent University, 01250 Adana, Turkey

Received 10 June 2011; Accepted 24 July 2011

Academic Editors: P. D. Corr, A. Komemushi, and O. Strohm

Copyright © 2011 Gurcan Erbay 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

Malignant fibrous histiocytoma is the second most common soft-tissue sarcoma in adults. After the extremities, the retroperitoneal space is the second most common site of this tumor. A 50-year-old man presented with a right retroperitoneal, thick-walled, cystic multilocular mass measuring 10 × 10 cm that was thought to be a type CE 5 hydatid cyst preoperatively. However, the postoperative histopathology did not agree with the radiological findings and instead showed a malignant fibrous histiocytoma. The computed tomography and ultrasound/Doppler ultrasound findings of this retroperitoneal mass mimicked a type CE 5 hydatid cyst. We present this case because the surgical management of these two lesions differs and misdiagnosis can be problematic.