disease arises from structure disease arises from alteration in structure teratoma ovarian teratoma https://www.malacards.org/card/ovarian_germ_cell_teratoma icd11.foundation:1752240825 EFO:0006463 UMLS:C0280131 germ cell teratoma of ovary germ cell teratoma of the ovary teratoma of the ovary ovarian teratoma MONDO:0005602 NCIT:C8110 teratoma of ovary A non-seminomatous germ cell tumor arising from the ovary. It is characterized by the presence of various tissues which correspond to the different germinal layers (endoderm, mesoderm, and ectoderm). According to the level of differentiation of the tissues which comprise the tumor, ovarian teratomas are classified as mature or immature. Mature teratomas are composed of well differentiated, adult-type tissues. Immature teratomas are composed of immature, fetal type-tissues. Mature ovarian teratomas without a fetal-type component have an excellent outcome. The prognosis of immature ovarian teratomas is related to the grade and stage of the tumor. MEDGEN:76072 ovarian germ cell teratoma GARD:0024209 DOID:5567 SCTID:716077006 gonadal teratoma ovarian germ cell tumor ovary