Ten cases of angiofibroma treated by irradiation are reported. Relief of symptoms occurred by the end of treatment in eight patients. Objective regression was much slower, six having visible disease for greater than 6 months and four for at least 1 year. Only one was symptomatic. Radiological resolution lagged behind clinical improvement and was complete in only one of three asymptomatic patients evaluated by computed tomography (CT) at between 2 and 3 years after treatment. The significance of these residual masses seen on CT is unclear.