Six patients suffering from cystic hypophysoma and one from craniopharyngioma treated with intracavitary radiation by colloidal 32P transnasophenoid injection were studied. After injection, the headache was eliminated and vision improved in all cases, visual field enlarged in 4, and sexuality improved in 5 male cases. All the patients recovered their normal daily life and work in 2-12 year's follow-up period. The conclusion is that the above mentioned therapy is simple, safe and effective.