Radiation therapy for juvenile angiofibroma: evaluation by CT and MRI, analysis of tumor regression, and selection of patients.

PURPOSE

To provide an analysis of nine patients with juvenile angiofibroma treated with radiotherapy between June 1975 and June 1987.

METHODS AND MATERIALS

All patients had a minimum 3 years of follow-up; six of the patients had greater than 5 years and four had greater than 10 years of follow-up. Two patients received radiotherapy as primary therapy, and the remaining seven patients were treated with surgery initially, followed by irradiation for recurrent disease. Characteristic computed tomography (CT), magnetic resonance (MR), and angiography findings were identified. All nine patients had nasal cavity or nasopharyngeal involvement. Eight patients had involvement of the base of the skull, and seven had intracranial extension. Tumor regression during and after treatment was estimated clinically and from available imaging studies.

RESULTS

Tumor regression during treatment ranged from 25% to 100%, with most patients experiencing between 30% and 50% clinical decrease in the size of the tumor. Seven patients eventually showed complete regression by physical examination, but only two of seven patients evaluated by CT and/or MR showed complete regression. In five patients, follow-up imaging studies showed stable residual changes. Local control was achieved in all patients. No late complications were found.

CONCLUSION

The initial treatment of early lesions is surgical. Low dose irradiation appears to be an effective alternative to extensive surgery in treating advanced juvenile angiofibroma. Morbidity has been minimal. Residual changes are seen in subsequent imaging studies but have remained stable with long follow-up.