NEUROBEHAVIORAL AND NEUROLOGIC OUTCOME IN LONG-TERM SURVIVORS OF POSTERIOR-FOSSA BRAIN-TUMORS - ROLE OF AGE AND PERIOPERATIVE FACTORS

We evaluated the neuropsychological and neurologic outcome of 15 long- term survivors of posterior fossa tumors who were treated between 1970 and 1984 with cranial irradiation (n = 15) and surgery (n = 14). The interval between diagnosis and evaluation ranged from 4 to 20 years (m edian = 10 years). Earlier age at diagnosis (< 6 years) was associated with an increased incidence of severe neurologic and neuropsychologic al sequelae. Hydrocephalus, obtundation, and tumor extension outside t he vermis also were more prevalent in the younger group. Poor neurobeh avioral outcomes in young children with posterior fossa tumors may be related to more aggressive tumor growth or complications of the initia l therapy and not solely due to toxicity from craniospinal irradiation .