Fig. 1.

Treatment of OC patients in Denmark, and inclusion in the Pelvic mass cohort. If a pelvic mass is suspected, the patient is examined by a gynecologist, whom will calculate RMI based on ultrasound, CA125 and menopause status. Based on RMI the patient is either sent to general gynecological surgery, or a tertiary gyn-onc cancer center. PET_CT/MR scanning determines the patient for either radical surgery with adjuvant chemotherapy or neoadjuvant chemotherapy with interval surgery. Women with a pelvic mass are enrolled in the pelvic mass cohort when they are forwarded to surgery. OC: ovarian cancer, CA125: cancer antigen 125, US: ultrasound scanning, MP: menopausal state, RMI: Risk of malignancy Index, gyn: gynecological, gyn-onc: gynecologic-oncology, PET_CT: Positron emission tomography–computed tomography, MR: Magnetic Resonance scanning.