Subarachnoid Hemorrhage Due to Flow-Related Dissection of the Posterior-Inferior Cerebellar Artery Associated with a Distal Arteriovenous Malformation.
Brain arteriovenous malformation
Cerebral arteriovenous malformation
Dissection
Hemodynamics
Hyperdynamic flow
Intraventricular hemorrhage
Rheodynamics
Subarachnoid hemorrhage
Journal
World neurosurgery
ISSN: 1878-8769
Titre abrégé: World Neurosurg
Pays: United States
ID NLM: 101528275
Informations de publication
Date de publication:
05 2019
05 2019
Historique:
received:
07
12
2018
revised:
15
01
2019
accepted:
17
01
2019
pubmed:
6
2
2019
medline:
24
10
2019
entrez:
6
2
2019
Statut:
ppublish
Résumé
Cerebral arteriovenous malformations (CAVMs) are characterized by altered hemodynamics and associated with angioanatomic changes, such as aneurysms. We encountered a patient with a CAVM-associated dissection of the medial trunk of the posterior inferior cerebellar artery (PICA) instead of an aneurysm. We report the case of a 56-year-old male patient with spontaneous subarachnoid hemorrhage within the cisterna magna and fourth ventricle. Digital subtraction angiography revealed a cerebellar arteriovenous malformation located within the inferior semilunar lobule that did not anatomically match the bleeding pattern. The left PICA, serving as a primary feeding artery, showed a dissection of the proximal portion of the medial trunk with a precise anatomic association with the blood in the telovelotonsillar space. CAVM-induced hyperdynamic flow through the feeding vessel is the most plausible pathophysiologic explanation for the dissection. Complete microsurgical resection of the CAVM was performed, and 3-month follow-up digital subtraction angiography showed complete regression of the dissection, disappearance of irregularities, and significant caliber reduction of the medial PICA trunk. This is the first report of a hyperdynamic flow-related dissection of a CAVM-associated feeding vessel. Microsurgical resection of the CAVM allowed for spontaneous resolution of the dissected area by restoration of normal rheodynamics.
Sections du résumé
BACKGROUND
Cerebral arteriovenous malformations (CAVMs) are characterized by altered hemodynamics and associated with angioanatomic changes, such as aneurysms. We encountered a patient with a CAVM-associated dissection of the medial trunk of the posterior inferior cerebellar artery (PICA) instead of an aneurysm.
CASE DESCRIPTION
We report the case of a 56-year-old male patient with spontaneous subarachnoid hemorrhage within the cisterna magna and fourth ventricle. Digital subtraction angiography revealed a cerebellar arteriovenous malformation located within the inferior semilunar lobule that did not anatomically match the bleeding pattern. The left PICA, serving as a primary feeding artery, showed a dissection of the proximal portion of the medial trunk with a precise anatomic association with the blood in the telovelotonsillar space. CAVM-induced hyperdynamic flow through the feeding vessel is the most plausible pathophysiologic explanation for the dissection. Complete microsurgical resection of the CAVM was performed, and 3-month follow-up digital subtraction angiography showed complete regression of the dissection, disappearance of irregularities, and significant caliber reduction of the medial PICA trunk.
CONCLUSIONS
This is the first report of a hyperdynamic flow-related dissection of a CAVM-associated feeding vessel. Microsurgical resection of the CAVM allowed for spontaneous resolution of the dissected area by restoration of normal rheodynamics.
Identifiants
pubmed: 30721771
pii: S1878-8750(19)30248-7
doi: 10.1016/j.wneu.2019.01.148
pii:
doi:
Types de publication
Case Reports
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
44-48Informations de copyright
Copyright © 2019 Elsevier Inc. All rights reserved.