Intravenous sinus meningioma with intraluminal extension to the internal jugular vein: case report and review of the literature

AbstractObjective:To evaluate the prevalence of variations in the anatomical route of the spinal accessory nerve from the base of the skull to the point where it enters the trapezius muscle. A case report is used to demonstrate an example of a rare but clinically important anatomical variant of this nerve.Methods:An independent review of the literature using Medline, PubMed and Q Read databases was performed using combinations of terms including ‘spinal accessory nerve’, ‘anatomy’, ‘surgical anatomy’, ‘anatomical variant’, ‘cranial nerve XI’ and ‘shoulder syndrome’.Results:Our report demonstrates marked variation in spinal accessory nerve anatomy. At the point of crossing over the internal jugular vein, the spinal accessory nerve passes most commonly laterally (anterior) to the internal jugular vein. The reported incidence of this lateral relationship varies from 67 to 96 per cent. The nerve can also pierce the internal jugular vein, as demonstrated in our case study, with incidence ranging from 0.48 to 3.3 per cent.Conclusion:Anatomical variations of the spinal accessory nerve are not uncommon, and it is important for the surgeon to be aware of such variations when undertaking surgery in both the anterior and posterior triangles of the neck.

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Anatomic variations of internal jugular vein, inferior petrosal sinus and its confluence pattern: Implications in inferior petrosal sinus catheterization

Interventional Neuroradiology ◽

10.1177/1753425915590067 ◽

2015 ◽

Vol 21 (6) ◽

pp. 769-773 ◽

Cited By ~ 3

Author(s):

Xianli Lv ◽

Zhongxue Wu

Keyword(s):

Computed Tomography ◽

Internal Jugular Vein ◽

Jugular Vein ◽

Treatment Strategies ◽

Diagnosis And Treatment ◽

Inferior Petrosal Sinus ◽

Anatomic Variations ◽

Review Of The Literature ◽

Spiral Computed ◽

Intracranial Lesions

Objective The purpose of this study is to describe anatomic variations of the internal jugular vein (IJV), inferior petrosal sinus (IPS) and their confluence pattern and implications in IPS catheterization. The anatomic route of IPS after going out of the cranium and its confluence patterns with IJV and will supply knowledge about typing of IPS-IJV junction. Method A review of the literature was performed. Results There might be different routes for entering the intracranial segment of the IPS and multislice spiral computed tomography (MSCT) is effective in identifying the confluences of the IPS with the IJV and their courses. It is important to find the confluence of IPS with IJV for diagnosis and treatment of intracranial lesions via venous route. Meanwhile, IPS diameter at the confluence can significantly affect success of catheterization. Conclusion The classification and the theory of the development of the caudal end of the IPS may be useful in establishing treatment strategies that involve endovascular manipulation via the IPS.

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