The objective of this study is to explore the integration of in vivo and ex vivo of MRI with histology and molecular assessments to advance non-invasive characterization of tumor heterogeneity in high-grade serous ovarian cance
Patient aged >18
Pathologically proven HGSOC at an advanced stage (FIGO IIIB or IIIC) which can benefit from surgery with or without prior neoadjuvant treatment
Willingness and ability to comply with planned visits, treatment plan, laboratory tests and other study procedures,
Patient who has given informed, written and express consent,
Early-stage disease (FIGO <IIIB) or presence of extraperitoneal metastases,
Patient who will not have surgery
Patient whose regular follow-up is impossible for psychological, family, social or geographical reasons,
Patient under guardianship, curatorship or safeguarding of justice,