Subdural contrast effusion during endovascular therapy: case report

  • Rasmus Holmboe Dahl
  • Vagn Eskesen
  • Goetz BenndorfEmail author
Case Report - Vascular Neurosurgery - Arteriovenous malformation
Part of the following topical collections:
  1. Vascular Neurosurgery – Arteriovenous malformation


Accumulation of contrast medium in the subdural space after diagnostic intraarterial contrast administration is a rare observation. The authors report the case of a subdural contrast effusion (SCE) presenting during endovascular treatment of an intracranial dural arteriovenous fistula (DAVF) mimicking an acute subdural hematoma. Differentiation between the two by computed tomography (CT) or intraprocedural Dyna CT and early neurological examination can be crucial for patient management. We believe that repeated large-volume contrast injections via large-bore intermediate catheters into the territory of an (even partly) occluded DAVF may induce leakage of contrast medium into the extravascular subdural space thereby causing a SCE.


Subdural contrast effusion Contrast extravasation DAVF Angiography 



computed tomography


dural arteriovenous fistula


digital subtraction angiography


endovascular therapy


Hounsfield unit


subdural contrast effusion


subdural hematoma


Author contributions

Conception and design: Dahl and Benndorf. Acquisition of data: Dahl and Benndorf. Analysis and interpretation of data: Dahl and Benndorf. Drafting the article: all authors. Critically revising the article: all authors. Reviewed submitted version of manuscript: all authors. Approved the final version of the manuscript on behalf of all authors: Benndorf. Administrative/technical/material support: Dahl and Benndorf. Study supervision: Benndorf.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Patient consent

The patient has consented to the submission of the case report to the journal.


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Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of RadiologyUniversity Hospital RigshospitaletCopenhagenDenmark
  2. 2.Department of NeurologyAalborg University HospitalAalborgDenmark
  3. 3.Department of NeurosurgeryUniversity Hospital RigshospitaletCopenhagenDenmark
  4. 4.Department of RadiologyBaylor College of MedicineHoustonUSA

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