"UMLS_CUI:C1518749"^^ . "An ovarian endodermal sinus tumor that is characterized by a polyvesicular vitelline pattern, which involves vesicular structures with eccentric constrictions surrounded by a dense spindle cell stroma."^^ . "NCI:C39987"^^ . . "polyvesicular vitelline pattern ovarian yolk sac tumor"^^ . "DOID:6514"^^ . . . "disease_ontology"^^ . .