Background: Tumours of the ovary are common forms of neoplasms in women. The pathology of ovarian neoplasms is one of the most complex areas of gynaecology, because the ovary gives rise to the greater and larger variety of tumours than any other organ. While in other organs, tissue of origin is usually clear, tissue from which an ovarian tumour arises is often uncertain and most of the development of the presumptive tissue is often in disparity.