because of morphologic and immunohistochemical similarities of large mononuclear cells with intermediate trophoblast of the normal placenta and gestational trophoblastic neoplasms , we propose that the large mononuclear cells in gonadal and extragonadal germ cell neoplasms are equivalent to the intermediate trophoblast .
C0018067
gonadal
C0262963
extragonadal germ cell