Related Experiment Video
Updated: Aug 17, 2026

Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model
Published on: June 18, 2021
Pseudo-subarachnoid hemorrhage: a CT-finding in spontaneous intracranial hypotension
Wouter I Schievink1, M Marcel Maya, James Tourje
1Maxine Dunitz Neurosurgical Institute, Cedars-Sinai Medical Center, 8631 West Third Street, Suite 800E, Los Angeles, CA 90048, USA. schievinkw@cshs.org
Abstract:
Increased attenuation in the basilar cisterns or along the tentorium cerebelli resembling subarachnoid hemorrhage (SAH) may be found on CT in the absence of blood (pseudo-SAH). The authors found pseudo-SAH on CT in four of 40 patients with spontaneous intracranial hypotension. All four patients had brain sagging with obliteration of the cisterns and pachymeningeal enhancement along the tentorium cerebelli. Spontaneous intracranial hypotension should be included in the differential diagnosis of pseudo-SAH.
Related Concept Videos
Hemorrhagic Stroke l: Introduction
Hemorrhagic Stroke ll: Pathophysiology
Increased Intracranial Pressure l: Introduction
Increased Intracranial Pressure ll: Pathophysiology
Cerebral Edema ll: Pathophysiology
Transient Ischemic Attack l: Introduction

