Clinical Experience and Management Strategy of Retroperitoneal Tumor With Venous Tumor Thrombus Involvement

Background: To report the surgical management, complications, and outcomes for patients with retroperitoneal tumor and venous thrombus Methods: We retrospectively analyzed 19 cases of retroperitoneal tumor with venous tumor thrombus from August 2015 to March 2021. According to the characteristics of surgical techniques, a new tumor thrombus PUTH grading system was proposed. Results: There were 2 cases of PUTH-1a, 2 cases of PUTH-1b, 6 cases of PUTH-2, 6 cases of PUTH-3,3 cases of PUTH-4. All the operations were successfully performed in 19 patients. Among them, 5 cases (26.3%) were operated by completely laparoscopic approach and 13 cases (68.4%) were operated by open approach. One case (5.3%) was converted from laparoscopic approach to open approach. 5 cases experienced postoperative complications, the incidence was 26.3%. All the cases were followed-up for a median of 14 months. Cancer associated death were occurred in 3 cases. Distant metastases were occurred in 7 cases. Conclusions: In this study, we proposed a new tumor thrombus grading system based on the anatomical characteristics of retroperitoneal tumors with venous tumor thrombus. Retroperitoneal tumor resection and removal of venous tumor thrombus are safe and effective in the treatment of such diseases.