NeuroradiologyChoriocarcinoma
rare, highly
malignant germ cell
tumour of the pineal region (see
pineal region tumour) devoid of specific characteristics on imaging studies as compared to other germ cell tumours except for the fact that they display a higher tendency to haemorrhagic degeneration. Prior to
biopsy, the diagnosis may be suspected clinically on the basis of
CSF analysis of
tumour markers. Choriocarcinoma expresses the beta subunit of human chorionic gonadotropin (-HCG) but not alpha-fetoprotein (AFP).
FS