Middle Cerebral Artery Stenosis Caused by Relatively Low-dose Irradiation with Stereotactic Radiosurgery for Cerebral Arteriovenous Malformations: Case Report

This case suggests that a normal major artery, if located close to the target volume, may be affected by low-dose irradiation (10 Gy or even slightly less) delivered with radiosurgery, although a decrease in blood flow through the M1 because of nidus shrinkage or associated stenosis of the distal middle cerebral artery, as well as other unknown factors, may also contribute to proximal M1 stenosis.