NCIt definition : A term that refers to teratoma, embryonal carcinoma, yolk sac tumor, choriocarcinoma,
or mixed forms of these tumors.;
Alternative definition : NICHD: A germ cell tumor other than a pure germinoma. These tumors (choriocarcinoma,
embryonal carcinoma, teratoma, yolk sac tumor, and mixed germ cell tumor) are histologically
distinct from one another.;