Anaplastic oligodendrogliomas These tumors are comparable to the highly anaplastic gliomas in prognosis. Survival statistics are inexact for this group because the cell types and grade of the most malignant-appearing cells influence prognosis. In general, these tumors carry a prognosis that is between the prognoses of well-differentiated and anaplastic astrocytomas. Medulloblastoma Medulloblastoma is a rapidly growing tumor arising in the posterior fossa and is found almost exclusively in children and young adults. It has the tendency to spread from the brain to the spinal axis.
Prognosis is dependent on the staging following surgical resection.
Pineal Region Tumors Pineal parenchymal tumors vary in histology and grade of malignancy relative to patient age at occurrence. They can vary from the slow-growing pineocytoma to the more malignant and faster growing pineoblastoma. These uncommon tumors vary in prognosis. The absence of biopsy specimens in many series make the prognosis for each tumor type difficult to evaluate. Craniopharyngiomas Craniopharyngioma is a tumor that arises from the remains of a structure found in the developing embryo in the region of the pituitary gland.