Abstract
The preliminary findings of a prospective study aimed at investigating changes in the language abilities of a group of children treated for posterior fossa tumours are reported. The results indicated that there is considerable variation in the effects of tumour treatment on language abilities in the period up to 28 months post-treatment, with the presence of residual language deficits being a possible, but not inevitable, outcome. Severe semantic-lexical deficits detected immediately post-treatment improved dramatically in the first six months after treatment.