Robotic Resection of Retroperitoneal Perinephric Tumor. Application of Intraurethral Indocyanine Green Injection As an Adjunct to Avoid Ureteral Injury.

The majority of retroperitoneal mass excision is performed via conventional "open" laparotomy due to concerns of technical difficulty and adequate oncological margins in cases of a malignant sarcoma. A very few cases of minimally invasive resection by laparoscopy had been reported in the literature. Despite the rapid adoption of robotic technology in general surgery and surgical oncology, the robotic technique has not been applied for this pathology. We discussed a complete resection of a large perinephric tumor using a robotic platform. To our knowledge, this is the first study to report the robotic technique of retroperitoneal tumor excision, highlighting the application and usefulness of intraurethral indocyanine green (ICG) injection.