the incidence of roentgenological calcification in various types of glioma were as follows : astrocytoma grades 1 & 2-15 % , astrocytoma grades 3 & 4-7 % , medulloblastoma-5 % , ependymoma-17 % , oligodendrogioma-60 % , and choroid plexus papilloma-25 % .
C0017638
glioma
C0014474
ependymoma