Ovarian cancers are gynecological cancers with a poor prognosis. Most ovarian cancers are high-grade serous carcinomas. It is now accepted that they are very often tubal in origin. Their management has undergone major advances in recent years. Their clinical manifestations are not very specific, and no screening test has yet -proved its worth, which explains why they are often diagnosed late. The diagnostic phase is essentially based on ultrasound and abdomino-pelvic CT scans, for reasons of ease of access. Other -examination modalities, such as MRI and above all PET-Ct, are playing an increasingly important role in the initial management of extension or thera-peutic follow-up. Even with notable advances in diagnosis and treatment, the overall prognosis remains poor.