[Effectiveness of radioisotope therapy of inoperable brain tumors according to the results of follow-up studies].

Intra-tissue and intracavitary beta- and gamma-therapy with Au198, P32 and Y90 was used in the system of combined treatment of 139 patients with inoperable tumors of the brain, among whom 40% were children. The results of follow-up periods of 5 to 17 years led to the conclusion that radioisotope treatment is effective in craniopharyngioma, tumors of the cerebral ventricles and inoperable meningioma of the base of the brain.