two of the tumors were pontine astrocytomas , one was a mixed ependymoma and astrocytoma involving the fourth ventricle and the brainstem , and one was an extraspinal malignant astrocytoma in the lumbar region of a young boy who earlier had been diagnosed as having a pontine glioma for which he received radiation treatment .
C0014474
ependymoma
C0017638
glioma