Adverse medical events associated with childhood cerebellar astrocytomas and medulloblastomas: natural history and relation to very long-term neurobehavioral outcome.

Objectives The objectives of the study are to document the incidence of medical events in survivors of childhood posterior fossa astrocytoma or medulloblastoma in four time periods (diagnosis, perioperative, short-term survival, long-term survival), and to study whether medical events predict neurobehavioral outcome.