Related Experiment Video
Updated: Sep 10, 2026

Microsurgical Clip Obliteration of Middle Cerebral Aneurysm Using Intraoperative Flow Assessment
Published on: September 25, 2009
Anterior communicating aneurysm missed at angiography: report of two cases treated surgically
1Department of Neurological Sciences, University of Rome, Italy.
Abstract:
We report two young adults with definite clinical and computed tomographic (CT) signs of subarachnoid hemorrhage in whom initial angiography showed spasm of the anterior portion of the circle of Willis, but no aneurysm. Repeat angiography some days later, when the vascular spasm had cleared, was likewise negative. In both patients, operation revealed an anterior communicating artery aneurysm, which was successfully excluded from the circulation. Our aims in reporting this unusual experience are to stress the practical importance of CT scanning in the diagnosis and treatment of subarachnoid hemorrhage and to discuss the decision to operate.
Related Concept Videos
Aneurysm I: Introduction
Aneurysm II: Clinical Manifestations and Diagnostic Studies
Aneurysm III: Interprofessional Care

