An evaluation of supervoltage orbital irradiation for Graves' ophthalmopathy.

Twenty patients with moderately severe ophthalmopathy due to Graves' disease or ophthalmic Graves' disease were treated by supervoltage orbital radiotherapy generated by a linear accelerator. Seven patients (35%) showed some response within 3 weeks of the treatment, four patients (20%) improved minimally while nine patients (45%) were unchanged. Improvement was noted mainly in soft tissue changes while proptosis decreased in only four patients. With one exception, ophthalmoplegia did not improve after the radiotherapy. The benefit obtained with the treatment was not impressive.