Ovarian Cancer:
Ovarian cancer is when abnormal cells in the ovary begin to multiply out of control and form a tumor. If left untreated, the tumor can spread to other parts of the body. This is called metastatic ovarian cancer.
Types of Ovarian Cancer:
The ovaries are made up of three types of cells. Each cell can develop into a different type of tumor:
Epithelial tumors form in the layer of tissue on the outside of the ovaries. About 90 percent of ovarian cancers are epithelial tumors.
Stromal tumors grow in the hormone-producing cells. Seven percent of ovarian cancers are stromal tumors.
Germ cell tumors develop in the egg-producing cells. Germ cell tumors are rare.