Indications and Limitations of vNOTES for the Surgical Staging of Early-Stage Ovarian Cancer: A Narrative Literature Review

Introduction: Natural Orifice Transluminal Endoscopic Surgery (NOTES) via the vagina (vNOTES) has recently appeared on the gynecology horizon as a fresh minimally invasive approach. Although vNOTES for benign adnexal conditions is being increasingly employed, very limited experiences exist for its application in ovarian tumors. In this review, the current state of vNOTES applicability for borderline ovarian tumors (BOTs) and estimated early-stage epithelial ovarian cancer (EOC) is assessed. Methods: A narrative literature review was performed to examine operative viability, perioperative safety and functional outcomes, and oncologic details as documented for patients with ovarian tumors undergoing vNOTES. Results: In the current literature, vNOTES has been utilized for adnexectomy, hysterectomy, infracolic omentectomy, peritoneal biopsies, and sampling of selective pelvic lymph nodes in carefully selected patients. The perioperative parameters—bleeding, perioperative pain, and length-of-stay indicators—have been satisfactory with minimal complications. For BOT, vNOTES can meet the requirements for all surgical goals except lymphadenectomy for metastasis evaluation for systemic management. In this context, lymphadenectomy is not necessary for BOT and therefore is no contraindication for vNOTES. However, for invasive EOC, this is a significant drawback as there is no lymphadenectomy for the evaluation and management for this complex subgroup. The oncology follow-up is prematurely limited and is heterogeneous and underpowered. Conclusions: Based on current available data, vNOTES is possible in a selected group of patients with borderline ovarian tumors and in patients with adnexal lesions that are believed to be in early-stage disease based upon imaging studies. For the treatment of invasive epithelial ovarian cancer, vNOTES should not be considered an independent staging procedure at any FIGO stage, but it might find a supplemental place in the setting of a hybrid procedure in a highly selected group of patients in an experienced center.