Headache. Diagnosing subarachnoid hemorrhage: are CT scans enough?
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Updated: May 26, 2026

Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model
Published on: June 18, 2021
Peter J Hutchinson1, Peter J Kirkpatrick
1Division of Neurosurgery, Department of Clinical Neurosciences, University of Cambridge, Addenbrooke's Hospital, Hills Road, Cambridge, UK. pjah2@cam.ac.uk
Abstract:
Subarachnoid hemorrhage is a rare but potentially fatal cause of headache. According to results from a recent study, CT scans enable clinicians to identify patients with subarachnoid hemorrhage, with a high sensitivity. Does CT imaging rule out the need for lumbar puncture in patients who present with headache?
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