Related Experiment Video
Updated: Mar 24, 2026

Endovascular Perforation Model for Subarachnoid Hemorrhage Combined with Magnetic Resonance Imaging MRI
Published on: December 16, 2021
Case report: acute subdural hematoma due to angiographically unvisualized ruptured aneurysm
Emiko Hori1, Tsuneaki Ogiichi, Nakamasa Hayashi
1Department of Neurosurgery, Toyama Medical and Pharmaceutical University, Toyama 930-0194, Japan. ehori-tym@umin.ac.jp
Background:
We report a case of acute subdural hematoma (SDH) due to angiographically unvisualized ruptured aneurysm.
Case Description:
A 57-year-old man presented with sudden-onset headache and nausea. Computed tomography revealed right acute SDH and cerebral angiography revealed no abnormal vessels, but at operation, we found an aneurysm arising from the precentral artery causing an acute SDH.
Conclusion:
In a case of spontaneous acute SDH, the possibility of a cortical artery aneurysm should be considered even if no aneurysm is recognized at angiography.
More Related Videos
Related Concept Videos
Aneurysm III: Interprofessional Care
Aneurysm II: Clinical Manifestations and Diagnostic Studies
Aneurysm I: Introduction

