A dysgerminoma that arises from the ovary and occurs in children. The disease is Monarch Disease Ontology entry MONDO_0004193 (pediatric ovarian dysgerminoma). Also known as: childhood dysgerminoma, childhood dysgerminoma of ovary, childhood ovarian dysgerminoma, childhood ovarian germinomatous germ cell tumor, childhood ovarian germinomatous germ cell tumour, dysgerminoma of ovary of childhood, paediatric dysgerminoma of ovary, pediatric dysgerminoma of ovary.