[Exploration on the application of perineal lateral arc-shaped incision in the resection of complex tumors on the lateral side of the pelvic floor].

Objective: To investigate the surgical approach for the resection of complex tumors located on the lateral side of the pelvic floor. Methods: A retrospective analysis was conducted on 24 patients with complex tumors on the lateral side of the pelvic floor who were treated at The First Affiliated Hospital of Zhengzhou University from April 2023 to April 2025. Among the 24 patients, there were 16 cases of aggressive pelvic myxoma of the pelvic floor (including 10 recurrent cases), 6 cases of soft tissue sarcoma (4 recurrent cases), and 2 cases of nerve sheath tumor. The perineal lateral arc-shaped incision was used as the primary approach in all surgeries, with some patients receiving an auxiliary abdominal incision. The operation time, intraoperative blood loss, R0 resection rate of the tumor, wound healing, and the impact of the incision on postoperative defecation, urination and lower limb function were analyzed. Results: The median operation time of the perineal lateral arc-shaped incision approach was 60 minutes (range: 35-180 min), and the median intraoperative blood loss was 130 ml (range: 20-600 ml) and the R0 resection rate was 100.0% (26/26). Primary healing of the perineal lateral incision was achieved in 21 cases, and secondary healing in 3 cases. No postoperative defecation or urination dysfunction was observed, and all patients had normal lower limb function postoperatively. Conclusion: The perineal lateral arc-shaped incision can effectively improve the resection rate of complex tumors on the lateral side of the pelvic floor, reduces surgical risks, and is not associated with significant postoperative complications.