Cerebral necrosis is a well-known delayed sequela of radiation to the central nervous system. Delayed intracerebral hemorrhage occurring several years after radiation is rare; however, with increased survival, this complication will become more common. We report a child who developed a brain-stem hemorrhage 4.5 years following radiation therapy for brainstem tumor. The possible pathogenesis for the spontaneous hemorrhage is discussed. The onset of the neurologic symptoms in this setting occurs later than the usual symptoms of radiation necrosis. It is important to recognize this entity as a late delayed complication of radiation therapy and not to mistake it for tumor recurrence.
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