serum levels of alpha-fetoprotein ( afp ) , human chorionic gonadotropin ( hcg ) and carcinoembryonic antigen ( cea ) were determined by radioimmunoassay in 14 patients with primary intracranial germ cell tumors in the pineal and/or chiasmal region and the relationship between afp , hcg and cea levels , tumor histopathology and survival time was studied .
C0205851
germ cell tumors
C0027651
tumor