Related Experiment Video
Updated: Aug 14, 2026

Comprehensive Endovascular and Open Surgical Management of Cerebral Arteriovenous Malformations
Published on: October 20, 2017
Sylvian subarachnoid and extra-pial cavernous angioma
1Department of Neurological Sciences, Neurosurgery, University La Sapienza, Rome, Italy. Jacopole@yahoo.it
Abstract:
Cavernous angiomas are one of the four types of vascular malformations of the central nervous system. Lesions situated subarachnoidally are rare although some cases with an infratentorial localization have been reported. Our case represents an unusual localization of a subarachnoid cavernous angioma. A 35- year-old patient was admitted to our department with signs of subarachnoid hemorrhage. A 1 cm hyperdense lesion placed at the right Sylvian fissure was distinguished by CT-scan examination and no arterial supply was revealed on cerebral angiography. Surgical intervention showed a lesion placed extra-pial and totally encased in the subarachnoid space in the superficial part of the Sylvian cistern. This case represents a radiologically visible supratentorial extra-pial subarachnoidal cavernous angioma. This case provides confirmation of one of the supposed causes of subarachnoid hemorrahage ''sine materia''.
More Related Videos
Related Concept Videos
Cerebral Edema ll: Pathophysiology
Hemorrhagic Stroke l: Introduction
Hemorrhagic Stroke ll: Pathophysiology
Cerebral Edema l: Introduction

