A 47-year-old woman has noted a pressure sensation, but no pain, in her pelvic region for the past 5 months. On physical examination there is a right adnexal mass. An ultrasound scan shows a 10 cm fluid-filled cystic mass in the right ovary. A fine needle aspirate of the mass is performed and cytologic examination of clear fluid aspirated from the mass reveals clusters of malignant epithelial cells surrounding psammoma bodies. Which of the following neoplasms is she most likely to have?

Gynecology and obstetrics are twin subjects that deal with the female reproductive system. While obstetrics deals with pregnancy and its associated procedures and complications, gynaecology involves treating women who are not pregnant. Gynecology comprises of both medicine as well as surgical fields.