Hyperperfusion syndrome after clipping of an unruptured aneurysm by transsylvian approach: A case repot

Abstract

A 68-year-old man developed symptomatic hyperperfusion syndrome after clipping of an unruptured left anterior choroidal artery aneurysm using a transsylvian approach with temporary internal carotid artery occlusion for 3 min. Although we preserved all adjacent vessels, the patient exhibited right hemiparesis and motor aphasia soon after the operation. Single photon emission computed tomography showed increased perfusion in the left cerebral hemisphere. These symptoms and hyperperfusion gradually resolved and disappeared completely within 2 weeks. Hyperperfusion syndrome should be considered even after uneventful clipping of unruptured aneurysms.

Keywords

• Hyperperfusion
• Aneurysm
• Clipping
• Transsylvian approach