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Case Reports in Pathology
Volume 2012, Article ID 749898, 4 pages
Case Report

Combined Cutaneous Sarcoma: Pleomorphic Liposarcoma and Conventional Osteosarcoma—The So-Called Malignant Mesenchymoma

1Servei de Patologia, Hospital Universitari Sant Joan de Reus, 43204 Tarragona, Spain
2Institut d'Investigació Sanitaria Pere Virgili (IISPV), Universitat Rovira i Virgili, Reus, Tarragona, Spain

Received 30 July 2012; Accepted 9 September 2012

Academic Editors: F. Al-Mulla and P. Kornprat

Copyright © 2012 David Parada and Karla B. Peña. 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.


Malignant mesenchymoma is combined soft tissue tumors of mesenchymal origin. Cutaneous combined sarcomas are exceedingly rare. We report the case of an 81-year-old woman who presented a left cutaneous mass. She underwent a wide local excision. Histopathological and immunohistochemical studies were consistent with the diagnosis of combined pleomorphic liposarcoma and conventional osteosarcoma (malignant mesenchymoma). Although it is extremely rare, this case suggests that combined sarcoma should be considered in the differential diagnosis of undifferentiated pleomorphic neoplasms.