Ovarian cancer

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Cancer that forms in tissues of the ovary. An ovary is one of a pair of female reproductive glands in which the ova, or eggs, are formed. Most ovarian cancers are either ovarian epithelial carcinomas or malignant germ cell tumors. Ovarian epithelial carcinomas is cancer that begins in the cells on the surface of the ovary. Malignant germ cell tumors is cancer that begins in egg cells.