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Our article presents some of the challenges of the surgical treatment of T4 (&gt;15 cm) retroperitoneal liposarcomas (up to 65∕56∕30 cm, 25.5 kg) series of cases treated by the Department of Surgical Oncology, Prof. Dr. Ion Chiricuţă Oncology Institute, Cluj-Napoca (IOCN), Romania, with illustrations, insisting on important blood vessels and nerves dissection and preservation and discussions of strategies with references to important articles from the last 10 years specialty literature. Challenges do not come only from intraoperative difficulties but also from establishing the right attitude from the extent of resection and oncological safety point of view, the role of the pathologist being very important because histological subtype and completeness of the resections are the most important prognostic factors for such tumors. Despite all today available aids in decision making, like nomograms or high-resolution imagery, sometimes this decision is to be taken intraoperative based on surgeon's expertise and skills. That is why is strongly advised that such cases to be treated in high-volume specialized tertiary centers of surgical oncology.

T4 retroperitoneal liposarcoma. Challenges of big size sarcomas surgical treatment