Further experiences in the treatment of cystic craniopharyngeomas with yttrium 90 silicate colloid.

20 patients suffering from cystic craniopharyngioma were treated with intracavitary irradiation on 25 occassions. The beta emitting radionuclide 90Y silicate colloid was instilled into the cyst or cystic part of the tumour. 17patients on 22 occasions underwent followup CT and ophthalmological examinations 1 to 144 (average: 34) months after the intracavitary radioisotope therapy.