_:vb50954609 . _:vb50954609 . _:vb50954609 . _:vb50954609 "An ovarian carcinoma that is an undifferentiated neoplasm composed of primitive-appearing cells."^^ . _:vb50954609 "url:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3858994/"^^ . _:vb50954609 . _:vb50954609 .