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A case of dural arteriovenous fistula presenting as acute subdural hematoma.
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PMID:  24926261     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
Dural arteriovenous fistula (AVF) presenting with subdural hematoma is relatively rare. We report a case of dural AVF presenting as acute subdural hematoma (ASDH) and provide a review of the literature. A 56-year-old man presented with disturbance of consciousness. Computed tomography demonstrated a right ASDH and a small right occipital subcortical hematoma. Cerebral angiography showed a dural AVF on the occipital convexity draining into the cortical veins. Emergent endovascular embolization was immediately performed and the shunt flow disappeared. Hematoma removal and external decompression were safely conducted. Combined therapy successfully recovered the patient's consciousness level. This rare case of dural AVF presenting with ASDH was treated with combined treatments of endovascular and open surgery.
Authors:
Atsushi Saito; Tomohiro Kawaguchi; Tatsuya Sasaki; Michiharu Nishijima
Publication Detail:
Type:  Journal Article     Date:  2014-04-30
Journal Detail:
Title:  Case reports in neurology     Volume:  6     ISSN:  1662-680X     ISO Abbreviation:  Case Rep Neurol     Publication Date:  2014 Jan 
Date Detail:
Created Date:  2014-06-13     Completed Date:  2014-06-13     Revised Date:  2014-06-16    
Medline Journal Info:
Nlm Unique ID:  101517693     Medline TA:  Case Rep Neurol     Country:  Switzerland    
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Languages:  eng     Pagination:  122-5     Citation Subset:  -    
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Journal ID (nlm-ta): Case Rep Neurol
Journal ID (iso-abbrev): Case Rep Neurol
Journal ID (publisher-id): CRN
ISSN: 1662-680X
Publisher: S. Karger AG, Allschwilerstrasse 10, P.O. Box · Postfach · Case postale, CH–4009, Basel, Switzerland · Schweiz · Suisse, Phone: +41 61 306 11 11, Fax: +41 61 306 12 34, karger@karger.ch
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Copyright © 2014 by S. Karger AG, Basel
open-access:
collection publication date: Season: Jan-Apr Year: 2014
Electronic publication date: Day: 30 Month: 4 Year: 2014
pmc-release publication date: Day: 30 Month: 4 Year: 2014
Volume: 6 Issue: 1
First Page: 122 Last Page: 125
PubMed Id: 24926261
ID: 4036125
DOI: 10.1159/000362116
Publisher Id: crn-0006-0122

A Case of Dural Arteriovenous Fistula Presenting as Acute Subdural Hematoma
Atsushi Saito*
Tomohiro Kawaguchi
Tatsuya Sasaki
Michiharu Nishijima
Department of Neurosurgery, Aomori Prefectural Central Hospital, Aomori, Japan
Correspondence: *Atsushi Saito, MD, PhD, Department of Neurosurgery, Aomori Prefectural Central Hospital, 2-1-1 Higashitsukurimichi, Aomori 0308553 (Japan), E-Mail satsushi2002@yahoo.co.jp

Introduction

Intracranial dural arteriovenous fistulas (AVFs) constitute 10–15% of intracranial vascular anomalies [1, 2]. AVF with retrograde cortical venous drainage has a high risk of developing an aggressive clinical course with intracranial hemorrhage [1, 3]. Hemorrhagic presentation with acute subdural hematoma (ASDH) due to dural AVF is very rare [4, 5]. We report an unusual case of dural AVF presenting as ASDH and discuss the clinical features with the aid of a literature review.


Case Report

A 56-year-old man presented with disturbance of consciousness after manifesting clouded consciousness, during which he could not open his eyes spontaneously without anisocoria. He was transported to the local neurosurgical department and diagnosed with intracerebral hematoma. He had no history of head trauma or hematological disorders. Computed tomography revealed a right ASDH of 1.5 cm in diameter and a 15-ml oval subcortical hematoma in the right occipital lobe associated with slight perifocal edema. The midline was slightly shifted to the left (fig. 1a). We planned our strategy of emergent removal of ASDH after diagnosis of the hemorrhagic source. Digital subtraction angiography was performed emergently and demonstrated a dural AVF located in the right occipital convexity. The main feeding arteries were the right middle meningeal artery, parietal branch of the superficial temporal artery and meningeal branch of the right occipital artery (fig. 1b). Shunt flow was not markedly high and drained into the superior sagittal sinus and vein of Galen via cortical veins on the occipital lobe associated with venous pouches and cortical reflux. The lesion was classified as type IV on the Cognard classification. ASDH removal was planned after obliteration of the hemorrhagic source of dural AVF by endovascular treatment because the consciousness level was not aggravated under hyperosmotic fluid administration, and endovascular embolization could be performed immediately after DSA. Transarterial embolization was performed via the right middle meningeal artery. Venous pouches were suspected ruptured points and were occluded with diluted n-butyl cyanoacrylate. Shunt flow disappeared after embolization. Craniotomy was subsequently performed and the subdural hematoma was evacuated with external decompression within 1 h after transarterial embolization. No hemorrhagic point was observed on the surface of the cortex. The shunting point on the surface of the dura mater was also removed. His consciousness level improved after surgery. The postoperative course was uneventful, and cranioplasty was performed after recovery from brain edema. He could communicate with conversation and walk with aid after 3 weeks of rehabilitation.


Discussion

We reviewed 9 cases of nontraumatic dural AVF associated with ASDH from the previous literature, including the present case (table 1) [1, 2, 3, 4, 5]. Four of 9 cases were associated with subcortical hematoma and 4 of 9 were pure ASDH. Four cases were classified as Cognard type III, 3 as IV and 1 as IIB. Six of 9 cases had direct venous drainage into cortical veins.

In our present case, venous ectasias might have had a fragile venous wall and was suspected of being a rupture point. The hemorrhagic pattern showed that the dominant location was subdural hematoma associated with a small amount of subcortical hematoma. The hemorrhagic point might be the subpial cortical vein draining into the superior sagittal sinus under venous high pressure due to arterial shunt flow. Rupture of the subpial vein might cause both laceration of arachnoid and cortical surfaces. A further hypothesis is that venous high pressure might aggravate cortical reflux and partial venous congestion might cause limited subcortical hemorrhage and simultaneously rupture at the fragile wall of the venous ectasias in the subdural space.

We experienced an unusual case of dural AVF presenting as ASDH. Emergent embolization and removal of the hematoma successfully recovered the patient's consciousness level.


References
1. Duffau H,Lopes M,Janosevic V,Sichez JP,Faillot T,Capelle L,et al. Early rebleeding from intracranial dural arteriovenous fistulas: report of 20 cases and review of the literatureJ NeurosurgYear: 199990788410413159
2. Kitazono M,Yamane K,Toyota A,Okita S,Kumano K,Hashimoto N,et al. A case of dural arteriovenous fistula associated with subcortical and subdural hemorrhage (in Japanese)No Shinkei GekaYear: 20103875776220697151
3. Malik GM,Pearce JE,Ausman JI,Mehta B. Dural arteriovenous malformations and intracranial hemorrhageNeurosurgeryYear: 1984153323396483147
4. Ogawa K,Oishi M,Mizutani T,Maejima S,Mori T. Dural arteriovenous fistula on the convexity presenting with pure acute subdural hematomaActa Neurol BelgYear: 201011019019220873450
5. Kominato Y,Matsui K,Hata Y,Matsui K,Kuwayama N,Ishizawa S,et al. Acute subdural hematoma due to arteriovenous malformation primarily in dura mater: a case reportLeg MedYear: 20046256260

Article Categories:
  • Published online: April, 2014

Keywords: Key words Dural arteriovenous fistula, Acute subdural hematoma, Intracerebral hematoma.

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