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Updated: Aug 12, 2026

Double Direct Injection of Blood into the Cisterna Magna as a Model of Subarachnoid Hemorrhage
Published on: August 30, 2020
Hyperacute spinal subdural haematoma as a complication of lumbar spinal anaesthesia: MRI
S Pedraza Gutiérrez1, S Coll Masfarré, C H Castaño Duque
1Magnetic Resonance Unit, Vall d'Hebron Hospitals, Barcelona, Spain. spedraza@hg.vhebron.es
Abstract:
We report two cases of hyperacute spinal subdural haematoma secondary to lumbar spinal anaesthesia, identified with MRI. Prompt diagnosis of this infrequent, potentially serious complication of spinal anaesthesia is essential, as early surgical evacuation may be needed. Suggestive MRI findings in this early phase include diffuse occupation filling of the spinal canal with poor delineation of the spinal cord on T1-weighted images, and a poorly-defined high-signal lesion with a low-signal rim on T2-weighted images.
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