This review looks at papers dealing with radiosurgery for tumors, cavernous malformations, and arteriovenous malformations. The tumors were meningiomas, many of them at the base of the brain, and the results were excellent. One paper used the gamma knife for patients with cavernous malformations. The authors encountered significant morbidity and concluded that these lesions should be treated surgically. There are two papers dealing with arteriovenous malformations. One of these showed that a significant number of arteriovenous malformations were not obliterated. The second report was on arteriovenous malformations treated with radiosurgery, and the authors found that some of the patients developed hemiparkinsonism and hemiparesis.