Ovarian cancer is an abnormal growth of tissue in the ovary. The ovaries are part of the female reproductive system and it is where the eggs are produced. Most ovarian cancers develop on the surface of the ovary.
There are 3 main types of ovarian cancer:
- Epithelial tumours develop on the surface (epithelium) of the ovary and are the most common type
- Germ cell tumours occur in the cells that produce the eggs and can develop in younger women
- Stromal tumours develop in the tissues that produce oestrogen and progesterone – these are the hormones that control the menstrual cycle