[Surgery in early-stage ovarian cancer: Article drafted from the French Guidelines in oncology entitled "Initial management of patients with epithelial ovarian cancer" developed by FRANCOGYN, CNGOF, SFOG, GINECO-ARCAGY under the aegis of CNGOF and endorsed by INCa].

Early stage ovarian epithelial cancer (stage I according to the FIGO classification, i.e. limited to ovaries) affects 20% to 33% of patients with ovarian cancer. This chapter only describes data on these presumed early stages. The rate of occult epiploic metastases varies from 2% to 4%, and leads to over-staging in stage III A of 3% to 11% of patients. Performing an omentectomy does not result in a change in survival in this situation (NP4). The rate of appendix metastasis ranges from 0% to 26.7% (NP4). In the mucinous subtype, this rate can reach 53% if the appendix is macroscopically abnormal (NP2). The rate of positive peritoneal cytology ranges from 20.9% to 27%. Positive peritoneal cytology is responsible for over-staging of patients in 4.3% to 52% of cases and appears as a poor prognostic factor on survival (NP4). The rate of occult peritoneal metastases varies from 1.1% to 16%. Performing these peritoneal biopsies results in over-staging of 4% to 7.1% (NP4). In the management of ovarian cancers at a presumed early stage, it is recommended to perform: omentectomy, peritoneal biopsies, cytology, appendectomy (grade C). In case of incomplete or incomplete initial staging, restaging including omentectomy, peritoneal biopsies and appendectomy (if not explored) is recommended; especially in the absence of a reported indication of chemotherapy. The lymph node invasion rate ranges from 6.3% to 22%. It is 4.5% to 18% for stages I and 17.5% to 31% in stages II. Between 8.5% and 13% of patients with suspected early stage ovarian cancer are reclassified to stage IIIA1 following the completion of lymphadenectomy (NP3). Pelvic and lumbo-aortic lymphadenectomy improves the survival of patients with ovarian cancer at a presumptive early stage (NP2). Pelvic and lumbo-aortic lymphadenectomy is recommended for presumed early ovarian stages (grade B). In case of initial treatment of early-stage ovarian cancer without lymph node staging, restadification including lymphadenectomy is recommended; especially in the absence of a stated indication of chemotherapy (grade B). No studies have shown any laparoscopic disadvantage compared to laparotomy for feasibility, safety, or postoperative rehabilitation (NP3) in surgical staging of patients with early-stage ovarian cancer. For the initial surgical management of these patients, the choice between laparoscopy or laparotomy depends on local conditions (tumor size) and surgical expertise. If complete surgery without risk of tumor rupture is possible, the laparoscopic approach is preferred (grade C). In the opposite case, median laparotomy is recommended. As part of surgical restadification, the laparoscopic approach is recommended (grade C). Intraoperative tumor rupture leads to a decrease in disease free survival (hazard ratio=2.28) and overall survival (hazard ratio=3.79) (NP2). It is recommended that all precautions be taken to avoid perioperative ovarian tumor rupture, including the intraoperative decision of laparoconversion (grade C). There is no specific study to answer the question of the feasibility of a one-time or two-time surgery during an extemporane diagnosis of an early stage ovarian cancer. The high sensitivity and specificity of this extemporane examination in this situation makes it possible to consider a surgical management of staging during the same operating time.

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