- Histology: Patient must have a histologically confirmed primary intracranial CNS medulloblastoma/PNET or other embryonal tumor (medulloepithelioma, ependymoblastoma, neuroblastoma, pineoblastoma), atypical teratoid/rhabdoid tumor, intracranial germ cell tumor, or choroid plexus carcinoma. Patients with M+ ependymoma are also eligible.