ovarian gonadoblastoma (MONDO_0002697) can be described as follows. A neoplasm that arises from the ovary and is composed of tissues that resemble dysgerminoma or seminoma and are admixed with sex cord tissues. It is found in children or young adults and usually is associated with secondary sex organs abnormalities. The majority of patients present as phenotypic females with virilization. The minority of patients present as phenotypic males with feminization. It typically affects both gonads. If a malignant germ cell component is present, it may metastasize to other anatomic sites. Also known as: gonadoblastoma of ovary, ovarian gonadoblastoma (disease), ovary gonadoblastoma.