Types of Ovarian Cancer

Ovarian cancer, the uncontrolled growth of malignant cells in the ovary, is the eighth most common cancer in women.

There are three primary types of ovarian cancer:

  • Epithelial, the cells covering the ovaries
  • Germ, the cells within the ovaries that develop into eggs
  • Stromal, the cells that produce estrogen and progesterone

Epithelial ovarian cancer comprises approximately 80 to 90 percent of ovarian cancer, while germ and stromal tumors represent the remaining 10 to 20 percent.