Prophylactic craniospinal irradiation is required in: (A) Medulloblastoma, (B) Meningoma, (C) Oligodendroglioma, (D) All of the above
Answer is A. Craniospinal irradiation is required in CNS tumors which can spread through CSF like Medulloblastoma, CNS lymphomas. It is also required in case of highly malignant tumors like glioblastoma multiforme.