Disease in which malignant cells form in the ovaries of the female. There are several types of Ovarian cancer:
Ovarian epithelial cancer forms in the tissue that covers the ovary.
Ovarian germ cell tumor forms in the germ (egg) cells of the ovary.
And, the very rare Childhood Ovarian cancer.
There is also a pre-cancerous condition that can form in the tissue covering the ovary.