ESGE/ESGO/SERGS consensus statement on surgical steps in minimally invasive surgery in gynecologic oncology: transperitoneal and extraperitioneal approach for paraaortic lymphadenectomy. International journal of gynecological cancer : official journal of the International Gynecological Cancer Society INTRODUCTION:Assessment of retroperitoneal nodes is an important part of the surgical staging of gynecologic cancers. Although pelvic and paraaortic lymphadenectomy have been widely described by different authors, there is little consensus on the description of the different surgical steps for each procedure. An Intergroup Committee on Onco-Gyn Minimally Invasive Surgery has been established with members of the European Society for Gynecological Endoscopy (ESGE), European Society of Gynaecological Oncology (ESGO) and the Society of European Robotic Gynaecological Surgery (SERGS). The Intergroup Committee has various objectives: writing down a surgical description of the technique, which will be assessed by a group of experts following a formal consensus method and developing a specific Objective Structured Assessment of Technical Skills (OSATS) scale for each procedure. METHODS:A hierarchical task analysis was conducted by a working group of eight experts from the three societies in order to identify the surgical steps of transperitoneal and extraperitoneal approach in paraaortic lymphadenectomy. The selection of the definitive surgical steps was confirmed by a group of 19 experts from the different societies, following a formal consensus method. Two rounds of Delphi panel rating were considered necessary for achieving an agreement. The consensus agreement identified 29 surgical steps in transperitoneal and 17 surgical steps in extraperitoneal approach to complete a paraaortic lymphadenectomy. Once the description of the procedure and the consensus were established, an Objective specific Scale for the Assessment of Technical Skills for Paraaortic lymphadenectomy (PA-OSATS) in the transperitoneal and extraperitoneal approach was developed. RESULTS:In the first round of rating we found that 28 steps out of 29 in the transperitoneal approach and 13 out of 17 in the extraperitoneal approach did not reach a strong degree of agreement. They were reformulated based on comments made by the experts, and submitted to a second round of rating and this finally achieved an agreement. CONCLUSION:We defined a list of surgical steps in transperitoneal and extraperitoneal approach in paraaortic lymphadenectomy and a specific PA-OSATS scale for these procedures. This tool will be useful for teaching, assessing and standardizing this surgical procedure. 10.1136/ijgc-2024-005796