Radiotherapy is used in treatment of angiofibroma when it involves

TREATMENT OF ANGIOFIBROMA:- Radiotherapy:- Radiotherapy has been used as a primary mode of treatment. A dose of 3000 to 3500 cGy in 15-18 fractions is delivered in 3-3.5 weeks. Response is not immediate. Tumour regresses slowly in about a year, sometimes even up to 3 years. Radiotherapy is also used for intracranial extension of disease when tumour derives its blood supply from the internal carotid system. Recurrent angiofibromas have also been treated by radiotherapy. Intensity modulated radiotherapy--a newer mode of treatment--may be employed. Ref:- Dhingra; pg num:-249