Abstract
Purpose
Although involvement of the osseous component with an anterior condylar dural arteriovenous fistula (AC-DAVF) has been frequently described, osseous venous structures in which AC-DAVFs develop have not been fully elucidated. We investigated osseous venous structures adjacent to the hypoglossal canal in normal controls and patients with AC-DAVFs.
Methods
The study included 50 individuals with unruptured aneurysms as normal controls and seven patients with AC-DAVFs. Osseous venous structures adjacent to the hypoglossal canal in normal controls were analyzed using computed tomography (CT) digital subtraction venography. In patients with AC-DAVFs, the fistulous pouches, draining veins, and surrounding venous structures were examined using cone beam CT.
Results
In 46.0% of laterals in normal controls, osseous venous structures were visualized within the jugular tubercle superomedially to the hypoglossal canal. We named these structures the jugular tubercle venous complex (JTVC). The JTVC was always continuous with the anterior condylar vein and was sometimes connected to surrounding venous channels. We detected nine fistulous pouches in the seven patients with AC-DAVFs. The fistulous pouches were in the JTVC (33.3%), anterior condylar vein (33.3%), and other venous channels within the exoccipital region (33.3%).
Conclusion
Although the JTVC is a venous structure frequently found in normal people, it had not been investigated until now. The venous channel between the anterior condylar vein and JTVC is a common origin site for AC-DAVFs, and it was associated with 66.6% of the AC-DAVF cases in the current study.
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Abbreviations
- AC-DAVF:
-
Anterior condylar dural arteriovenous fistula
- CBCT:
-
Cone beam CT
- CTA:
-
CT angiography
- CT-DSA:
-
CT digital subtraction angiography
- CT-DSV:
-
CT digital subtraction venography
- DAVF:
-
Dural arteriovenous fistula
- JTVC:
-
Jugular tubercle venous complex
- TVE:
-
Transvenous embolization
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Acknowledgements
The authors thank Dr. Masaki Komiyama and Dr. Kittipong Srivatanakul for their advice and suggestions on neurovascular anatomy.
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We declare that all human studies have been approved by the ethics committee of Keio University School of Medicine and have therefore been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.
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Mizutani, K., Akiyama, T., Minami, Y. et al. Intraosseous venous structures adjacent to the jugular tubercle associated with an anterior condylar dural arteriovenous fistula. Neuroradiology 60, 487–496 (2018). https://doi.org/10.1007/s00234-018-1990-8
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DOI: https://doi.org/10.1007/s00234-018-1990-8