The aim of this course is to help surgical oncologists dedicated to sarcoma, residents and fellows to gain insights into the sarcoma track. The course will provide a detailed approach to preoperative workout, multimodal management, as well as surgical anatomy and surgical technique for retroperitoneal sarcoma. At the end of the course, participants will have a better knowledge on diagnosis and treatment of retroperitoneal sarcoma, and the most updated guidelines on treatment of primary disease.