NCIt synonyms : Ovarian Endodermal Sinus Tumor; Yolk Sac Tumor of the Ovary; Germ Cell Endodermal Sinus Neoplasm of the Ovary; Germ Cell Endodermal Sinus Neoplasm of Ovary; Yolk Sac Neoplasm of Ovary; Yolk Sac Neoplasm of the Ovary; Endodermal Sinus Neoplasm of Ovary; Germ Cell Endodermal Sinus Tumor of the Ovary; Ovarian Germ Cell Endodermal Sinus Tumor; Endodermal Sinus Tumor of Ovary; Ovarian Germ Cell Endodermal Sinus Neoplasm; Ovarian Endodermal Sinus Neoplasm; Yolk Sac Tumor of Ovary; Endodermal Sinus Neoplasm of the Ovary; Endodermal Sinus Tumor of the Ovary; Ovarian Yolk Sac Neoplasm; Germ Cell Endodermal Sinus Tumor of Ovary;
NCIt definition : A usually rapidly growing malignant germ cell tumor arising from the ovary. It usually
occurs in children and adolescents. Signs and symptoms include abdominal pain and
a large abdominal or pelvic mass. The serum alpha-fetoprotein is almost always elevated
preoperatively. Morphologically, there is marked heterogeneity due to numerous patterns
of differentiation coexisting in the same tumor. The most common pattern is reticular.;