RT Journal Article SR Electronic T1 ESGO/ISUOG/IOTA/ESGE Consensus Statement on pre-operative diagnosis of ovarian tumors JF International Journal of Gynecologic Cancer JO Int J Gynecol Cancer FD BMJ Publishing Group Ltd SP ijgc-2021-002565 DO 10.1136/ijgc-2021-002565 A1 Dirk Timmerman A1 François Planchamp A1 Tom Bourne A1 Chiara Landolfo A1 Andreas du Bois A1 Luis Chiva A1 David Cibula A1 Nicole Concin A1 Daniela Fischerova A1 Wouter Froyman A1 Guillermo Gallardo Madueño A1 Birthe Lemley A1 Annika Loft A1 Liliana Mereu A1 Philippe Morice A1 Denis Querleu A1 Antonia Carla Testa A1 Ignace Vergote A1 Vincent Vandecaveye A1 Giovanni Scambia A1 Christina Fotopoulou YR 2021 UL http://ijgc.bmj.com/content/early/2021/06/10/ijgc-2021-002565.abstract AB The European Society of Gynaecological Oncology (ESGO), the International Society of Ultrasound in Obstetrics and Gynecology (ISUOG), the International Ovarian Tumour Analysis (IOTA) group, and the European Society for Gynaecological Endoscopy (ESGE) jointly developed clinically relevant and evidence-based statements on the pre-operative diagnosis of ovarian tumors, including imaging techniques, biomarkers, and prediction models. ESGO/ISUOG/IOTA/ESGE nominated a multidisciplinary international group, including expert practising clinicians and researchers who have demonstrated leadership and expertise in the pre-operative diagnosis of ovarian tumors and management of patients with ovarian cancer (19 experts across Europe). A patient representative was also included in the group. To ensure that the statements were evidence-based, the current literature was reviewed and critically appraised. Preliminary statements were drafted based on the review of the relevant literature. During a conference call, the whole group discussed each preliminary statement and a first round of voting was carried out. Statements were removed when a consensus among group members was not obtained. The voters had the opportunity to provide comments/suggestions with their votes. The statements were then revised accordingly. Another round of voting was carried out according to the same rules to allow the whole group to evaluate the revised version of the statements. The group achieved consensus on 18 statements. This Consensus Statement presents these ESGO/ISUOG/IOTA/ESGE statements on the pre-operative diagnosis of ovarian tumors and the assessment of carcinomatosis, together with a summary of the evidence supporting each statement.All data relevant to the study are included in the article or uploaded as supplementary information.