BMC Cancer 2009, 9:205 http://www.biomedcentral.com/1471-2407/9/205 13. Dalal KM, Kattan MW, Antonescu CR, Brennan MF, Singer S: Sub- type specific prognostic nomogram for patients with pri- mary liposarcoma of the retroperitoneum, extremity, or trunk. Ann Surg 2006, 244(3):381-391. 14. Murphey MD: World Health Organization classification of bone and soft tissue tumors: modifications and implications for radiologists. Semin Musculoskelet Radiol 2007, 11(3):201-214. 15. Enzinger FM, Winslow DJ: Liposarcoma. A study of 103 cases. Virchows Arch Pathol Anat Physiol Klin Med 1962, 335:367-388. 16. O'Connor M, Snover DC: Liposarcoma. A review of factors influencing prognosis. Am Surg 1983, 49(7):379-384. 17. Yang JC, Chang AE, Baker AR, Sindelar WF, Danforth DN, Topalian SL, DeLaney T, Glatstein E, Steinberg SM, Merino MJ, et al.: Rand- omized prospective study of the benefit of adjuvant radiation therapy in the treatment of soft tissue sarcomas of the extremity. J Clin Oncol 1998, 16(1):197-203. 18. Pisters PW, Harrison LB, Woodruff JM, Gaynor JJ, Brennan MF: A prospective randomized trial of adjuvant brachytherapy in the management of low-grade soft tissue sarcomas of the extremity and superficial trunk. J Clin Oncol 1994, 12(6):1150-1155. 19. Catton CN, O'Sullivan B, Kotwall C, Cummings B, Hao Y, Fornasier V: Outcome and prognosis in retroperitoneal soft tissue sar- coma. Int J Radiat Oncol Biol Phys 1994, 29(5):1005-1010. 20. Heslin MJ, Lewis JJ, Nadler E, Newman E, Woodruff JM, Casper ES, Leung D, Brennan MF: Prognostic factors associated with long- term survival for retroperitoneal sarcoma: implications for management. J Clin Oncol 1997, 15(8):2832-2839. Pre-publication history The pre-publication history for this paper can be accessed here: http://www.biomedcentral.com/1471-2407/9/205/pre pub Publish with Bio Med Central and every scientist can read your work free of charge "BioMed Central will be the most significant development for disseminating the results of biomedical research in our lifetime." Sir Paul Nurse, Cancer Research UK Your research papers will be: available free of charge to the entire biomedical community peer reviewed and published immediately upon acceptance cited in PubMed and archived on PubMed Central yours — you keep the copyright Submit your manuscript here: http://www.biomedcentral.com/info/publishing_adv.asp BioMedcentral Page 8 of 8 (page number not for citation purposes)