carcinoembryonic antigen ( cea ) in plasma , cerebrospinal fluid ( csf ) , and tumor cyst fluid obtained from patients with a variety of intracranial tumors was determined by radioimmunoassay slightly elevated levels of plasma cea , ranging from 2.6 to 3.8 ng/ml , were noted in six ( 4 % ) of 161 patients with primary brain tumors : in three gliomas , two pineal tumors , and one acoustic neurinoma , respectively .
C0006118
of
C0031941
pineal tumors