Abstract

Introduction: Serous borderline ovarian tumours are intermediate group of neoplasms which have both benign and malign features and account for 10%-20% of ovarian neoplasms. Case: A 22-year-old nulligravid woman was admitted to our clinic complained with menstrual irregularity, abdominal pain and bloating abdomen. Computed tomography and MRI were performed. There was a large multilocular complex cystic mass almost filling the whole pelvis. The postoperative pathological diagnosis was reported as serous borderline ovarian tumor. Discussion: Although ultrasonography (US) is the first-line diagnostic method in the radiological evaluation of adnexal masses, magnetic resonance imaging (MRI) is mainly used in the evaluation due to high soft tissue discrimination. Computed tomography may be helpful but usually not diagnostic.